Đề thi thử tốt nghiệp THPT QG môn Toán năm 2020
Tuyển chọn số 5
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Câu 1:
Đặt \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaiodaaeqaaOGaaGynaiabg2da9iaadgga % aaa!3C61! {\log _3}5 = a\), khi đó \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaiodaaeqaaOWaaSaaaeaacaaIZaaabaGa % aGOmaiaaiwdaaaaaaa!3BFE! {\log _3}\frac{3}{{25}}\) bằng
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGOmaiaadggaaaaaaa!3860! \frac{1}{{2a}}\)
B. 1 - 2a
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGymaiabgk % HiTmaalaaabaGaamyyaaqaaiaaikdaaaaaaa!394D! 1- \frac{a}{2}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGymaiabgk % HiTmaalaaabaGaamyyaaqaaiaaikdaaaaaaa!394D! 1 + \frac{a}{2}\)
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Câu 2:
Họ nguyên hàm của hàm số \(f\left( x \right) = 2x + {2^x}\)
A. \({x^2} + \frac{{{2^x}}}{{\ln 2}} + C\)
B. \({x^2} + {2^x}.\ln 2 + C\)
C. \(2 + {2^x}.\ln 2 + C\)
D. \(2 + \frac{{{2^x}}}{{\ln 2}} + C\)
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Câu 3:
Cho hàm số y = f(x) có bảng biến thiên như sau
Mệnh đề nào sau đây đúng?
A. Hàm số đạt cực đại tại x = 5.
B. Hàm số đạt cực tiểu tại x = 2.
C. Hàm số có giá trị cực đại bằng – 1.
D. Hàm số đạt cực tiểu tại x = -6.
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Câu 4:
Cho hình nón có đường cao và đường kính đáy cùng bằng 2a. Cắt hình nón đã cho bởi một mặt phẳng qua trục, diện tích thiết diện bằng
A. \(8a^2\)
B. \(a^2\)
C. \(2a^2\)
D. \(4a^2\)
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Câu 5:
Cho hàm số y =f(x) xác định, liên tục trên R và có bảng biến thiên như hình dưới đây. Đồ thị hàm số y =f(x) cắt đường thẳng y = -2019 tại bao nhiêu điểm?
A. 2
B. 4
C. 1
D. 0
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Câu 6:
Gọi \(z_1;z_2\) là các nghiệm phức của phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOEamaaCa % aaleqabaGaaGOmaaaakiabgkHiTiaaikdacaWG6bGaey4kaSIaaGyn % aiabg2da9iaaicdaaaa!3DEE! {z^2} - 2z + 5 = 0\). Giá trị của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOEamaaDa % aaleaacaaIXaaabaGaaGOmaaaakiabgUcaRiaadQhadaqhaaWcbaGa % aGOmaaqaaiaaikdaaaaaaa!3C26! z_1^2 + z_2^2\) bằng
A. 14
B. -9
C. -6
D. 7
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Câu 7:
Biết đồ thị hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg% da9maalaaabaGaamiEaiabgkHiTiaaikdaaeaacaWG4bGaey4kaSIa % aGymaaaaaaa!3D47! y = \frac{{x - 2}}{{x + 1}}\) cắt trục Ox,Oy lần lượt tại hai điểm phân biệt A,B. Tính diện tích của tam giác OAB.
A. 1
B. \(\frac{1}{2}\)
C. 2
D. 4
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Câu 8:
Trong không gian Oxyz, cho mặt cầu \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGtbaacaGLOaGaayzkaaGaaiOoaiaadIhadaahaaWcbeqaaiaaikda % aaGccqGHRaWkcaWG5bWaaWbaaSqabeaacaaIYaaaaOGaey4kaSIaam % OEamaaCaaaleqabaGaaGOmaaaakiabgkHiTiaaikdacaWG4bGaeyOe % I0IaaGOmaiaadMhacqGHRaWkcaaI2aGaamOEaiabgkHiTiaaigdaca % aIXaGaeyypa0JaaGimaaaa!4CBA! \left( S \right):{x^2} + {y^2} + {z^2} - 2x - 2y + 6z - 11 = 0\). Tọa độ tâm mặt cầu (S) là I(a,b,c). Tính a + b + c.
A. -1
B. 1
C. 0
D. 3
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Câu 9:
Tập xác định D của hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iGacYgacaGGVbGaai4zamaaBaaaleaacaaIYaaabeaakmaabmaa % baGaamiEaiabgUcaRiaaigdaaiaawIcacaGLPaaaaaa!3FDC! y = {\log _2}\left( {x + 1} \right)\) là
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maabmaabaGaaGimaiaacUdacqGHRaWkcqGHEisPaiaawIcacaGL % Paaaaaa!3D17! D = \left( {0; + \infty } \right)\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maabmaabaGaeyOeI0IaaGymaiaacUdacqGHRaWkcqGHEisPaiaa % wIcacaGLPaaaaaa!3E05! D = \left( { - 1; + \infty } \right)\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maabmaabaGaeyOeI0IaaGymaiaacUdacqGHRaWkcqGHEisPaiaa % wIcacaGLPaaaaaa!3E05! D = \left[{ - 1; + \infty } \right)\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maajibabaGaaGimaiaacUdacqGHRaWkcqGHEisPaiaawUfacaGL % Paaaaaa!3D61! D = \left[ {0; + \infty } \right)\)
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Câu 10:
Cho số phức z thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOEamaabm % aabaGaaGOmaiabgkHiTiaadMgaaiaawIcacaGLPaaacqGHRaWkcaaI % XaGaaGOmaiaadMgacqGH9aqpcaaIXaaaaa!401A! z\left( {2 - i} \right) + 12i = 1\) . Tính môđun của số phức z.
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6baacaGLhWUaayjcSdGaeyypa0JaaGOmaiaaiMdaaaa!3C99! \left| z \right| = 29\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6baacaGLhWUaayjcSdGaeyypa0ZaaOaaaeaacaaIYaGaaGyoaaWc % beaaaaa!3CB4! \left| z \right| = \sqrt {29} \)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6baacaGLhWUaayjcSdGaeyypa0ZaaSaaaeaadaGcaaqaaiaaikda % caaI5aaaleqaaaGcbaGaaG4maaaaaaa!3D8B! \left| z \right| = \frac{{\sqrt {29} }}{3}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6baacaGLhWUaayjcSdGaeyypa0ZaaSaaaeaacaaI1aWaaOaaaeaa % caaIYaGaaGyoaaWcbeaaaOqaaiaaiodaaaaaaa!3E4A! \left| z \right| = \frac{{5\sqrt {29} }}{3}\)
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Câu 11:
Cho hàm số y =f(x) xác định trên R\{1}, liên tục trên mỗi khoảng xác định và có bảng biến thiên như hình dưới đây. Hỏi đồ thị hàm số đã cho có bao nhiêu đường tiệm cận?
A. 1
B. 2
C. 3
D. 4
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Câu 12:
Trong không gian với hệ trục tọa độ Oxyz, mặt phẳng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGqbaacaGLOaGaayzkaaGaaiOoaiaadggacaWG4bGaey4kaSIaamOy % aiaadMhacqGHRaWkcaWGJbGaamOEaiabgkHiTiaaiMdacqGH9aqpca % aIWaaaaa!43F2! \left( P \right):ax + by + cz - 9 = 0\) chứa hai điểm A(3;2;1) ; B(-3;5;2) và vuông góc với mặt phẳng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGrbaacaGLOaGaayzkaaGaaiOoaiaaiodacaWG4bGaey4kaSIaamyE % aiabgUcaRiaadQhacqGHRaWkcaaI0aGaeyypa0JaaGimaaaa!41EB! \left( Q \right):3x + y + z + 4 = 0\). Tính tổng S = a+b+c.
A. -12
B. 2
C. -4
D. -2
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Câu 13:
Trong khai triển \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WG4bGaey4kaSYaaSaaaeaacaaI4aaabaGaamiEamaaCaaaleqabaGa % aGOmaaaaaaaakiaawIcacaGLPaaadaahaaWcbeqaaiaaiMdaaaaaaa!3D0D! {\left( {x + \frac{8}{{{x^2}}}} \right)^9}\), số hạng không chứa x là
A. 84
B. 43008.
C. 4308
D. 86016
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Câu 14:
Tính tích các nghiệm thực của phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmamaaCa % aaleqabaGaamiEamaaCaaameqabaGaaGOmaaaaliabgkHiTiaaigda % aaGccqGH9aqpcaaIZaWaaWbaaSqabeaacaaIYaGaamiEaiabgUcaRi % aaiodaaaaaaa!3FC8! {2^{{x^2} - 1}} = {3^{2x + 3}}\).
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyOeI0IaaG % 4maiGacYgacaGGVbGaai4zamaaBaaaleaacaaIYaaabeaakiaaioda % aaa!3C1C! - 3{\log _2}3\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyOeI0IaaG % 4maiGacYgacaGGVbGaai4zamaaBaaaleaacaaIYaaabeaakiaaioda % aaa!3C1C! -{\log _2}54\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyOeI0IaaG % 4maiGacYgacaGGVbGaai4zamaaBaaaleaacaaIYaaabeaakiaaioda % aaa!3C1C! 1 - {\log _2}3\)
D. -1
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Câu 15:
Cho khối lăng trụ ABC.A'B'C' có thể tích bằng V. Tính thể tích khối đa diện BAA'C'C
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIZaGaamOvaaqaaiaaisdaaaaaaa!3859! \frac{{3V}}{4}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIYaGaamOvaaqaaiaaiodaaaaaaa!3857! \frac{{2V}}{3}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIYaGaamOvaaqaaiaaiodaaaaaaa!3857! \frac{{V}}{2}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIYaGaamOvaaqaaiaaiodaaaaaaa!3857! \frac{{V}}{4}\)
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Câu 16:
Cho hai số phức \(z_1,z_2\) thay đổi, luôn thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaSbaaSqaaiaaigdaaeqaaOGaeyOeI0IaaGymaiabgkHiTiaa % ikdacaWGPbaacaGLhWUaayjcSdGaeyypa0JaaGymaaaa!4105! \left| {{z_1} - 1 - 2i} \right| = 1\) và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaSbaaSqaaiaaikdaaeqaaOGaeyOeI0IaaGynaiabgUcaRiaa % dMgaaiaawEa7caGLiWoacqGH9aqpcaaIYaaaaa!4044! \left| {{z_2} - 5 + i} \right| = 2\). Tìm giá trị nhỏ nhất \(P_{min}\) của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiuaiabg2 % da9maaemaabaGaamOEamaaBaaaleaacaaIXaaabeaakiabgkHiTiaa % dQhadaWgaaWcbaGaaGOmaaqabaaakiaawEa7caGLiWoaaaa!3FBE! P = \left| {{z_1} - {z_2}} \right|\).
A. 1
B. 2
C. 5
D. 3
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Câu 17:
Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9maalaaabaGaamiEamaaCaaaleqabaGaaGinaaaaaOqaaiaaisda % aaGaeyOeI0YaaSaaaeaacaWGTbGaamiEamaaCaaaleqabaGaaG4maa % aaaOqaaiaaiodaaaGaey4kaSYaaSaaaeaacaWG4bWaaWbaaSqabeaa % caaIYaaaaaGcbaGaaGOmaaaacqGHsislcaWGTbGaamiEaiabgUcaRi % aaikdacaaIWaGaaGymaiaaiMdaaaa!49A4! y= \frac{{{x^4}}}{4} - \frac{{m{x^3}}}{3} + \frac{{{x^2}}}{2} - mx + 2019\) ( m là tham số). Gọi S là tập hợp tất cả các giá trị nguyên của tham sốmđể hàm đã cho đồng biến trên khoảng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aI2aGaai4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!3B4E! \left( {6; + \infty } \right)\) . Tính số phần tử của S biết rằng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WGTbaacaGLhWUaayjcSdGaeyizImQaaGOmaiaaicdacaaIYaGaaGim % aaaa!3EA8! \left| m \right| \le 2020\).
A. 4041.
B. 2027.
C. 2026.
D. 2015.
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Câu 18:
Cho hàm số y = f(x) có đồ thị gồm một phần đường thẳng và một phần đường parabol có đỉnh là gốc tọa độ O như hình vẽ. Giá trị của bằng
A. \(\frac{26}{3}\)
B. \(\frac{38}{3}\)
C. \(\frac{4}{3}\)
D. \(\frac{28}{3}\)
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Câu 19:
Cho hai số phức \(z_1,z_2\) thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaSbaaSqaaiaaigdaaeqaaOGaey4kaSIaaGOmaiabgUcaRiaa % iodacaWGPbaacaGLhWUaayjcSdGaeyypa0JaaGynamaaemaabaGaam % OEamaaBaaaleaacaaIYaaabeaakiabgUcaRiaaikdacqGHRaWkcaaI % ZaGaamyAaaGaay5bSlaawIa7aiabg2da9iaaiodaaaa!4BF6! \left| {{z_1} + 2 + 3i} \right| = 5\left| {{z_2} + 2 + 3i} \right| = 3\). Gọi \(m_0\) là giá trị lớn nhất của phần thực số phức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WG6bWaaSbaaSqaaiaaigdaaeqaaOGaey4kaSIaaGOmaiabgUcaRiaa % iodacaWGPbaabaGaamOEamaaBaaaleaacaaIYaaabeaakiabgUcaRi % aaikdacqGHRaWkcaaIZaGaamyAaaaaaaa!423A! \frac{{{z_1} + 2 + 3i}}{{{z_2} + 2 + 3i}}\). Tìm \(m_0\) .
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIZaaabaGaaGynaaaaaaa!377F! \frac{3}{5}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI4aGaaGymaaqaaiaaikdacaaI1aaaaaaa!38FB! \frac{{81}}{{25}}\)
C. 3
D. 5
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Câu 20:
Ở một số nước có nền nông nghiệp phát triển sau khi thu hoạch lúa xong, rơm được cuộn thành những cuộn hình trụ và được xếp chở về nhà. Mỗi đống rơm thường được xếp thành 5 chồng sao cho các cuộn rơm tiếp xúc với nhau (tham khảo hình vẽ).
Giả sử bán kính của mỗi cuộn rơm là 1m. Tính chiều cao SH của đống rơm?
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aI0aWaaOaaaeaacaaIZaaaleqaaOGaey4kaSIaaGOmaaGaayjkaiaa % wMcaaaaa!3ABA! \left( {4\sqrt 3 + 2} \right) (m)\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIZaWaaOaaaeaacaaIYaaaleqaaOGaey4kaSIaaGOmaaGaayjkaiaa % wMcaaaaa!3AB8! \left( {3\sqrt 2 + 2} \right)(m)\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGinamaaka % aabaGaaG4maaWcbeaaaaa!3789! 4\sqrt 3 (m)\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIYaWaaOaaaeaacaaIZaaaleqaaOGaey4kaSIaaGymaaGaayjkaiaa % wMcaaaaa!3AB7! \left( {2\sqrt 3 + 1} \right)(m)\)
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Câu 21:
Cho hàm số y = f(x) có bảng biến thiên dưới đây:
Để phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaG4maiaadA % gadaqadaqaaiaaikdacaWG4bGaeyOeI0IaaGymaaGaayjkaiaawMca % aiabg2da9iaad2gacqGHsislcaaIYaaaaa!4026! 3f\left( {2x - 1} \right) = m - 2\) có 3 nghiệm phân biệt thuộc [0;1] thì giá trị của tham số m thuộc khoảng nào dưới đây?
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaeyOeI0IaaG4maaGaayjkaiaawMcaaaaa % !3C43! \left( { - \infty ; - 3} \right)\)
B. (0;6)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aI2aGaai4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!3B4E! \left( {6; + \infty } \right)\)
D. (-3;1)
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Câu 22:
Cho hàm số y = f(x). Hàm số y = f'(x) có đồ thị như sau:
Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg6da+iaadIhadaahaaWcbeqa % aiaaikdaaaGccqGHsislcaaIYaGaamiEaiabgUcaRiaad2gaaaa!40D6! f\left( x \right) > {x^2} - 2x + m\) đúng với mọi \(x\in(1;2)\) khi và chỉ khi
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgs % MiJkaadAgadaqadaqaaiaaikdaaiaawIcacaGLPaaaaaa!3BCA! m \le f\left( 2 \right)\)
B. m < f(1) - 1
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgw % MiZkaadAgadaqadaqaaiaaikdaaiaawIcacaGLPaaacqGHsislcaaI % Xaaaaa!3D83! m \ge f\left( 2 \right) - 1\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgw % MiZkaadAgadaqadaqaaiaaigdaaiaawIcacaGLPaaacqGHRaWkcaaI % Xaaaaa!3D77! m \ge f\left( 1 \right) + 1\)
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Câu 23:
Có bao nhiêu giá trị dương của số thực a sao cho phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOEamaaCa % aaleqabaGaaGOmaaaakiabgUcaRmaakaaabaGaaG4maaWcbeaakiaa % dQhacqGHRaWkcaWGHbWaaWbaaSqabeaacaaIYaaaaOGaeyOeI0IaaG % OmaiaadggacqGH9aqpcaaIWaaaaa!41B2! {z^2} + \sqrt 3 z + {a^2} - 2a = 0\) có nghiệm phức \(z_0\) thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaSbaaSqaaiaaicdaaeqaaaGccaGLhWUaayjcSdGaeyypa0Za % aOaaaeaacaaIZaaaleqaaaaa!3CE2! \left| {{z_0}} \right| = \sqrt 3 \).
A. 3
B. 2
C. 1
D. 4
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Câu 24:
Cho hàm số y =f(x), biết tại các điểm A,B,C đồ thị hàm số có tiếp tuyến được thể hiện trên hình vẽ bên. Mệnh đề nào dưới đây đúng?
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOzayaafa % WaaeWaaeaacaWG4bWaaSbaaSqaaiaadoeaaeqaaaGccaGLOaGaayzk % aaGaeyipaWJabmOzayaafaWaaeWaaeaacaWG4bWaaSbaaSqaaiaadg % eaaeqaaaGccaGLOaGaayzkaaGaeyipaWJabmOzayaafaWaaeWaaeaa % caWG4bWaaSbaaSqaaiaadkeaaeqaaaGccaGLOaGaayzkaaaaaa!4569! f'\left( {{x_C}} \right) < f'\left( {{x_A}} \right) < f'\left( {{x_B}} \right)\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOzayaafa % WaaeWaaeaacaWG4bWaaSbaaSqaaiaadgeaaeqaaaGccaGLOaGaayzk % aaGaeyipaWJabmOzayaafaWaaeWaaeaacaWG4bWaaSbaaSqaaiaadk % eaaeqaaaGccaGLOaGaayzkaaGaeyipaWJabmOzayaafaWaaeWaaeaa % caWG4bWaaSbaaSqaaiaadoeaaeqaaaGccaGLOaGaayzkaaaaaa!4569! f'\left( {{x_A}} \right) < f'\left( {{x_B}} \right) < f'\left( {{x_C}} \right)\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOzayaafa % WaaeWaaeaacaWG4bWaaSbaaSqaaiaadgeaaeqaaaGccaGLOaGaayzk % aaGaeyipaWJabmOzayaafaWaaeWaaeaacaWG4bWaaSbaaSqaaiaado % eaaeqaaaGccaGLOaGaayzkaaGaeyipaWJabmOzayaafaWaaeWaaeaa % caWG4bWaaSbaaSqaaiaadkeaaeqaaaGccaGLOaGaayzkaaaaaa!4569! f'\left( {{x_A}} \right) < f'\left( {{x_C}} \right) < f'\left( {{x_B}} \right)\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOzayaafa % WaaeWaaeaacaWG4bWaaSbaaSqaaiaadkeaaeqaaaGccaGLOaGaayzk % aaGaeyipaWJabmOzayaafaWaaeWaaeaacaWG4bWaaSbaaSqaaiaadg % eaaeqaaaGccaGLOaGaayzkaaGaeyipaWJabmOzayaafaWaaeWaaeaa % caWG4bWaaSbaaSqaaiaadoeaaeqaaaGccaGLOaGaayzkaaaaaa!4569! f'\left( {{x_B}} \right) < f'\left( {{x_A}} \right) < f'\left( {{x_C}} \right)\)
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Câu 25:
Trong không gian với hệ trục tọa độ Oxyz, cho hai điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaabm % aabaGaaGOmaiaacUdacaaIXaGaai4oaiaaiodaaiaawIcacaGLPaaa % caGGSaGaamOqamaabmaabaGaaGOnaiaacUdacaaI1aGaai4oaiaaiw % daaiaawIcacaGLPaaaaaa!42B0! A\left( {2;1;3} \right),B\left( {6;5;5} \right)\). Gọi (S) là mặt cầu đường kính AB . Mặt phẳng (P) vuông góc với AB tại H sao cho khối nón đỉnh A và đáy là hình tròn tâm H (giao của mặt cầu (S) và mặt phẳng (P) ) có thể tích lớn nhất, biết rằng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGqbaacaGLOaGaayzkaaGaaiOoaiaaikdacaWG4bGaey4kaSIaamOy % aiaadMhacqGHRaWkcaWGJbGaamOEaiabgUcaRiaadsgacqGH9aqpca % aIWaaaaa!43E3! \left( P \right):2x + by + cz + d = 0\) với \(b,c,d \in Z\). Tính S = b+c+d.
A. 18
B. -18
C. -12
D. 24
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Câu 26:
Cho hàm số y =f(x) liên tục trên R và có bảng biến thiên như hình dưới.
Tập hợp tất cả các giá trị thực của tham số m để phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaaG4maiGacogacaGGVbGaai4CaiaadIhacqGHRaWkcaaIYaaa % caGLOaGaayzkaaGaeyypa0JaamyBaaaa!408A! f\left( {3\cos x + 2} \right) = m\) có nghiệm thuộc khoảng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsisldaWcaaqaaiabec8aWbqaaiaaikdaaaGaai4oamaalaaabaGa % eqiWdahabaGaaGOmaaaaaiaawIcacaGLPaaaaaa!3E3A! \left( { - \frac{\pi }{2};\frac{\pi }{2}} \right)\).
A. (1;3)
B. (-1;1)
C. (-1;3)
D. [1;3)
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Câu 27:
Cho hàm số f(x) thỏa mãn f(1) = 5 và \(2xf'\left( x \right) + f\left( x \right) = 6x\) với mọi x > 0.
Tính \(\int\limits_4^9 {f\left( x \right)dx}\).
A. 71
B. 59
C. 136
D. 21
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Câu 28:
Cho hàm số bậc bốn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iaadAgadaqadaqaaiaadIhaaiaawIcacaGLPaaacqGH9aqpcaWG % HbGaamiEamaaCaaaleqabaGaaGinaaaakiabgUcaRiaadkgacaWG4b % WaaWbaaSqabeaacaaIZaaaaOGaey4kaSIaam4yaiaadIhadaahaaWc % beqaaiaaikdaaaGccqGHRaWkcaWGKbGaamiEaiabgUcaRiaadwgaaa % a!4B4E! y = f\left( x \right) = a{x^4} + b{x^3} + c{x^2} + dx + e\) có đồ thị f'(x) như hình vẽ. Phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaaikdacaWGHbGaey4k % aSIaamOyaiabgUcaRiaadogacqGHRaWkcaWGKbGaey4kaSIaamyzaa % aa!4336! f\left( x \right) = 2a + b + c + d + e\) có số nghiệm là
A. 3
B. 4
C. 2
D. 1
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Câu 29:
Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaaikdacaaIWaGaaGym % aiaaiMdadaahaaWcbeqaaiaadIhaaaGccqGHsislcaaIYaGaaGimai % aaigdacaaI5aWaaWbaaSqabeaacqGHsislcaWG4baaaaaa!448A! f\left( x \right) = {2019^x} - {2019^{ - x}}\). Tìm số nguyên m lớn nhất để \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamyBaaGaayjkaiaawMcaaiabgUcaRiaadAgadaqadaqaaiaa % ikdacaWGTbGaey4kaSIaaGOmaiaaicdacaaIXaGaaGyoaaGaayjkai % aawMcaaiabgYda8iaaicdaaaa!43F1! f\left( m \right) + f\left( {2m + 2019} \right) < 0\)
A. – 673.
B. – 674.
C. 673.
D. 674.
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Câu 30:
Trong không gian Oxyz, cho mặt cầu \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGtbaacaGLOaGaayzkaaGaaiOoamaabmaabaGaamiEaiabgkHiTiaa % igdaaiaawIcacaGLPaaadaahaaWcbeqaaiaaikdaaaGccqGHRaWkda % qadaqaaiaadMhacqGHRaWkcaaIYaaacaGLOaGaayzkaaWaaWbaaSqa % beaacaaIYaaaaOGaey4kaSYaaeWaaeaacaWG6bGaeyOeI0IaaG4maa % GaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaakiabg2da9iaaikda % caaI3aaaaa!4CB7! \left( S \right):{\left( {x - 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z - 3} \right)^2} = 27\). Gọi \((\alpha)\) là mặt phẳng đi qua hai điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaabm % aabaGaaGimaiaacUdacaaIWaGaai4oaiabgkHiTiaaisdaaiaawIca % caGLPaaacaGGSaGaamOqamaabmaabaGaaGOmaiaacUdacaaIWaGaai % 4oaiaaicdaaiaawIcacaGLPaaaaaa!438D! A\left( {0;0; - 4} \right),B\left( {2;0;0} \right)\) và cắt (S) theo giao tuyến là đường tròn (C). Xét các khối nón có đỉnh là tâm của (S) và đáy là ( C ). Biết rằng khi thể tích của khối nón lớn nhất thì mặt phẳng \((\alpha)\) có phương trình dạng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyyaiaadI % hacqGHRaWkcaWGIbGaamyEaiabgkHiTiaadQhacqGHRaWkcaWGKbGa % eyypa0JaaGimaaaa!4014! ax + by - z + d = 0\). Tính P = a + b + c.
A. -4
B. 8
C. 0
D. 4
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Câu 31:
Trong các số phức z thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaada % WcaaqaamaabmaabaGaaGymaiaaikdacqGHsislcaaI1aGaamyAaaGa % ayjkaiaawMcaaiaadQhacqGHRaWkcaaIXaGaaG4naiabgUcaRiaaiE % dacaWGPbaabaGaamOEaiabgkHiTiaaikdacqGHsislcaWGPbaaaaGa % ay5bSlaawIa7aiabg2da9iaaigdacaaIZaaaaa!4BAE! \left| {\frac{{\left( {12 - 5i} \right)z + 17 + 7i}}{{z - 2 - i}}} \right| = 13\). Tìm giá trị nhỏ nhất của |z|.
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIZaWaaOaaaeaacaaIXaGaaG4maaWcbeaaaOqaaiaaikdacaaI2aaa % aaaa!39D9! \frac{{2\sqrt {13} }}{{26}}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaada % GcaaqaaiaaiwdaaSqabaaakeaacaaI1aaaaaaa!37A6! \frac{{\sqrt 5 }}{5}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGOmaaaaaaa!377A! \frac{1}{2}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIYaaaleqaaaaa!36CA! \sqrt 2 \)
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Câu 32:
Diện tích hình phẳng giới hạn bởi đồ thị hàm số bậc ba y = f(x) và các trục tọa độ là S = 32 (hình vẽ bên). Tính thể tích vật tròn xoay được tạo thành khi quay hình phẳng trên quanh trục Ox.
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIZaGaaG4maiaaikdacaaI4aGaeqiWdahabaGaaG4maiaaiwdaaaaa % aa!3C34! \frac{{3328\pi }}{{35}}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI5aGaaGOmaiaaigdacaaI2aGaeqiWdahabaGaaGynaaaaaaa!3B79! \frac{{9216\pi }}{5}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaG4maiaaiodacaaIXaGaaGOmaiabec8aWbqaaiaaiodacaaI % 1aaaaaaa!3CE8! \frac{{13312\pi }}{{35}}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaGimaiaaikdacaaI0aGaeqiWdahabaGaaGynaaaaaaa!3B6E! \frac{{1024\pi }}{5}\)
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Câu 33:
Trong không gian Oxyz , cho ba điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaabm % aabaGaaGimaiaacUdacaaIWaGaai4oaiaaigdaaiaawIcacaGLPaaa % caGGSaGaamOqamaabmaabaGaeyOeI0IaaGymaiaacUdacaaIXaGaai % 4oaiaaicdaaiaawIcacaGLPaaacaGGSaGaam4qamaabmaabaGaaGym % aiaacUdacaaIWaGaai4oaiabgkHiTiaaigdaaiaawIcacaGLPaaaaa % a!4B26! A\left( {0;0;1} \right),B\left( { - 1;1;0} \right),C\left( {1;0; - 1} \right)\). Điểm M thuộc mặt phẳng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGqbaacaGLOaGaayzkaaGaaiOoaiaaikdacaWG4bGaey4kaSIaaGOm % aiaadMhacqGHsislcaWG6bGaey4kaSIaaGOmaiabg2da9iaaicdaaa % a!42AE! \left( P \right):2x + 2y - z + 2 = 0\) sao cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaG4maiaad2 % eacaWGbbWaaWbaaSqabeaacaaIYaaaaOGaey4kaSIaaGOmaiaad2ea % caWGcbWaaWbaaSqabeaacaaIYaaaaOGaey4kaSIaamytaiaadoeada % ahaaWcbeqaaiaaikdaaaaaaa!40CA! 3M{A^2} + 2M{B^2} + M{C^2}\) đạt giá trị nhỏ nhất. Giá trị nhỏ nhất đó bằng
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaG4maaqaaiaaiAdaaaaaaa!383B! \frac{{13}}{6}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaG4maaqaaiaaiAdaaaaaaa!383B! \frac{{17}}{2}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaG4maaqaaiaaiAdaaaaaaa!383B! \frac{{61}}{6}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaG4maaqaaiaaiAdaaaaaaa!383B! \frac{{23}}{2}\)
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Câu 34:
Cho tứ diện ABCD có thể tích bằng V hai điểm M,P lần lượt là trung điểm của AB,CD điểm \(N \in AD\) sao cho AD = 3AN. Tính thể tích tứ diện BMNP.
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGwbaabaGaaGinaaaaaaa!379C! \frac{V}{4}\)
B. \(\frac{V}{12}\)
C. \(\frac{V}{8}\)
D. \(\frac{V}{6}\)
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Câu 35:
Cho hàm số f(x), đồ thị hàm số f’(x) như hình vẽ.
Hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4zamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaadAgadaqadaqaaiaa % dIhadaahaaWcbeqaaiaaikdaaaaakiaawIcacaGLPaaacqGHsislda % WcaaqaaiaadIhadaahaaWcbeqaaiaaiAdaaaaakeaacaaIZaaaaiab % gUcaRiaadIhadaahaaWcbeqaaiaaisdaaaGccqGHsislcaWG4bWaaW % baaSqabeaacaaIYaaaaaaa!4824! g\left( x \right) = f\left( {{x^2}} \right) - \frac{{{x^6}}}{3} + {x^4} - {x^2}\) đạt cực tiểu tại bao nhiêu điểm?
A. 3
B. 2
C. 0
D. 1
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Câu 36:
Có bao nhiêu giá trị nguyên dương của tham số m để tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIZaWaaWbaaSqabeaacaWG4bGaey4kaSIaaGOmaaaakiabgkHiTmaa % kaaabaGaaG4maaWcbeaaaOGaayjkaiaawMcaamaabmaabaGaaG4mam % aaCaaaleqabaGaamiEaaaakiabgkHiTiaaikdacaWGTbaacaGLOaGa % ayzkaaGaeyipaWJaaGimaaaa!44AD! \left( {{3^{x + 2}} - \sqrt 3 } \right)\left( {{3^x} - 2m} \right) < 0\) chứa không quá 9 số nguyên?
A. 3281.
B. 3283.
C. 3280.
D. 3279.
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Câu 37:
Cho hàm số bậc ba \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaadggacaWG4bWaaWba % aSqabeaacaaIZaaaaOGaey4kaSIaamOyaiaadIhadaahaaWcbeqaai % aaikdaaaGccqGHRaWkcaWGJbGaamiEaiabgUcaRiaadsgaaaa!458C! f\left( x \right) = a{x^3} + b{x^2} + cx + d\) có đồ thị như hình vẽ bên. Giá trị nhỏ nhất của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiuaiabg2 % da9iaadggadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaWGJbWaaWba % aSqabeaacaaIYaaaaOGaey4kaSIaamOyaiabgUcaRiaaikdaaaa!3FCB! P = {a^2} + {c^2} + b + 2\).
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGynaaaaaaa!377D! \frac{1}{5}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGynaaaaaaa!377D! \frac{1}{3}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGynaaaaaaa!377D! \frac{5}{8}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGynaaaaaaa!377D! \frac{13}{8}\)
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Câu 38:
Cho hàm số y = f(x) có đạo hàm liên tục trên [0;1] thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaace % WGMbGbauaadaqadaqaaiaadIhaaiaawIcacaGLPaaaaiaawIcacaGL % PaaadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaaI0aGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaaiIdacaWG4bWaaWba % aSqabeaacaaIYaaaaOGaey4kaSIaaGinaiaacYcacqGHaiIicaWG4b % GaeyicI48aamWaaeaacaaIWaGaai4oaiaaigdaaiaawUfacaGLDbaa % aaa!4E7C! {\left( {f'\left( x \right)} \right)^2} + 4f\left( x \right) = 8{x^2} + 4,\forall x \in \left[ {0;1} \right]\) và f(1) = 2 . Tính \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaada % WadaqaaiaadAgadaqadaqaaiaadIhaaiaawIcacaGLPaaacqGHRaWk % caWG4baacaGLBbGaayzxaaGaamizaiaadIhaaSqaaiaaicdaaeaaca % aIXaaaniabgUIiYdaaaa!42F9! \int\limits_0^1 {\left[ {f\left( x \right) + x} \right]dx} \).
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaGymaaqaaiaaiAdaaaaaaa!3839! \frac{{11}}{6}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaGymaaqaaiaaiAdaaaaaaa!3839! \frac{{4}}{3}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaGaaGymaaqaaiaaiAdaaaaaaa!3839! \frac{{5}}{6}\)
D. 2
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Câu 39:
Một nhóm gồm 3 học sinh lớp 10, 3 học sinh lớp 11 và 3 học sinh lớp 12 được xếp ngồi vào một hàng có 9 ghế, mỗi học sinh ngồi 1 ghế. Tính xác suất để 3 học sinh lớp 10 không ngồi 3 ghế liên tiếp nhau.
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aaabaGaaGymaiaaikdaaaaaaa!3839! \frac{5}{{12}}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aaabaGaaGymaiaaikdaaaaaaa!3839! \frac{1}{{12}}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aaabaGaaGymaiaaikdaaaaaaa!3839! \frac{7}{{12}}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aaabaGaaGymaiaaikdaaaaaaa!3839! \frac{11}{{12}}\)
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Câu 40:
Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9maalaaabaGaaGOmaiaadIhacqGHsislcaaIZaaabaGaamiEaiab % gkHiTiaaikdaaaaaaa!3E10! y = \frac{{2x - 3}}{{x - 2}}\) có đồ thị (C). Gọi I là giao điểm của các đường tiệm cận của (C). Biết rằng tồn tại hai điểm M thuộc đồ thị (C) sao cho tiếp tuyến tại M của ( C) tạo với các đường tiệm cận một tam giác có chu vi nhỏ nhất. Tổng hoành độ của hai điểm M là
A. 4
B. 0
C. 3
D. 1
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Câu 41:
Cho số phức z thay đổi thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bGaey4kaSIaaGymaiabgkHiTiaadMgaaiaawEa7caGLiWoacqGH % 9aqpcaaIZaaaaa!3F4F! \left| {z + 1 - i} \right| = 3\). Giá trị nhỏ nhất của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqaiabg2 % da9iaaikdadaabdaqaaiaadQhacqGHsislcaaI0aGaey4kaSIaaGyn % aiaadMgaaiaawEa7caGLiWoacqGHRaWkdaabdaqaaiaadQhacqGHRa % WkcaaIXaGaeyOeI0IaaG4naiaadMgaaiaawEa7caGLiWoaaaa!4A12! A = 2\left| {z - 4 + 5i} \right| + \left| {z + 1 - 7i} \right|\) bằng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyyamaaka % aabaGaamOyaaWcbeaaaaa!37DB! a\sqrt b \)(với a,b là các số nguyên). Tính S = 2a + b?
A. 20
B. 18
C. 23
D. 17
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Câu 42:
Cho hình trụ (T) có chiều cao bằng đường kính đáy, hai đáy là các hình tròn (O;r) và (O’;r). Gọi A là điểm di động trên đường tròn (O;r) và B là điểm di động trên đường tròn (O’;r) sao cho AB không là đường sinh của hình trụ (T). Khi thể tích khối tứ diện OO’AB đạt giá trị lớn nhất thì đoạn thẳng AB có độ dài bằng
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIZaaaleqaaOGaamOCaaaa!37CC! \sqrt 3 r\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIYaGaey4kaSYaaOaaaeaacaaIYaaaleqaaaGccaGLOaGaayzkaaGa % amOCaaaa!3AF2! \left( {2 + \sqrt 2 } \right)r\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aI2aaaleqaaOGaamOCaaaa!37CF! \sqrt 6 r\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aI1aaaleqaaOGaamOCaaaa!37CE! \sqrt 5 \)
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Câu 43:
Trong không gian Oxyz, cho mặt cầu \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGtbaacaGLOaGaayzkaaGaaiOoamaabmaabaGaamiEaiabgkHiTiaa % igdaaiaawIcacaGLPaaadaahaaWcbeqaaiaaikdaaaGccqGHRaWkda % qadaqaaiaadMhacqGHsislcaaIYaaacaGLOaGaayzkaaWaaWbaaSqa % beaacaaIYaaaaOGaey4kaSYaaeWaaeaacaWG6bGaeyOeI0IaaGymaa % GaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaakiabg2da9iaaioda % daahaaWcbeqaaiaaikdaaaaaaa!4CE9! \left( S \right):{\left( {x - 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z - 1} \right)^2} = {3^2}\) , mặt phẳng \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % WGqbaacaGLOaGaayzkaaGaaiOoaiaadIhacqGHsislcaWG5bGaey4k % aSIaamOEaiabgUcaRiaaiodacqGH9aqpcaaIWaaaaa!4137! \left( P \right):x - y + z + 3 = 0\) và điểm N(1;0;-4) thuộc (P). Một đường thẳng \(\Delta\) đi qua N nằm trong (P) cắt (S) tại hai điểm A,B thỏa mãn AB =4. Gọi \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8Haaeaaca % WG1baacaGLxdcacqGH9aqpdaqadaqaaiaaigdacaGG7aGaamOyaiaa % cUdacaWGJbaacaGLOaGaayzkaaGaaiilamaabmaabaGaam4yaiabg6 % da+iaaicdaaiaawIcacaGLPaaaaaa!441B! \overrightarrow u = \left( {1;b;c} \right),\left( {c > 0} \right)\) là một vecto chỉ phương của \(\Delta\), tổng b+c bằng
A. 1
B. 3
C. -1
D. 45
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Câu 44:
Anh C đi làm với mức lương khởi điểm là x (triệu đồng/tháng), và số tiền lương này được nhận vào ngày đầu tháng. Vì làm việc chăm chỉ và có trách nhiệm nên sau 36 tháng kể từ ngày đi làm, anh C được tăng lương thêm 10%. Mỗi tháng, anh ta giữ lại 20% số tiền lương để gửi tiết kiệm vào ngân hàng với kì hạn 1 tháng và lãi suất là 0,5% / tháng theo hình thức lãi kép (tức là tiền lãi của tháng này được nhập vào vốn để tính lãi cho tháng tiếp theo). Sau 48 tháng kể từ ngày đi làm, anh C nhận được số tiền cả gốc và lãi là 100 triệu đồng. Hỏi mức lương khởi điểm của người đó là bao nhiêu?
A. 8.991.504 đồng.
B. 9.891.504 đồng.
C. 8.981.504 đồng.
D. 9.881.505 đồng.
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Câu 45:
Cho hàm số y = f(x) liên tục và có đạo hàm trên R thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGynaiaadA % gadaqadaqaaiaadIhaaiaawIcacaGLPaaacqGHsislcaaI3aGaamOz % amaabmaabaGaaGymaiabgkHiTiaadIhaaiaawIcacaGLPaaacqGH9a % qpcaaIZaWaaeWaaeaacaWG4bWaaWbaaSqabeaacaaIYaaaaOGaeyOe % I0IaaGOmaiaadIhaaiaawIcacaGLPaaacaGGSaGaeyiaIiIaamiEai % abgIGiolabl2riHcaa!4E3D! 5f\left( x \right) - 7f\left( {1 - x} \right) = 3\left( {{x^2} - 2x} \right),\forall x \in R\). Biết rằng tích phân \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamysaiabg2 % da9maapehabaGaamiEaiaac6caceWGMbGbauaadaqadaqaaiaadIha % aiaawIcacaGLPaaacaWGKbGaamiEaaWcbaGaaGimaaqaaiaaigdaa0 % Gaey4kIipakiabg2da9iabgkHiTmaalaaabaGaamyyaaqaaiaadkga % aaaaaa!4691! I = \int\limits_0^1 {x.f'\left( x \right)dx} = - \frac{a}{b}\) (với \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGHbaabaGaamOyaaaaaaa!37D0! \frac{a}{b}\) là phân số tối giản). Tính T = 2a + b
A. 11
B. 0
C. 14
D. -16
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Câu 46:
Trong không gian với hệ tọa độ Oxyz, cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaabm % aabaGaamyyaiaacUdacaaIWaGaai4oaiaaicdaaiaawIcacaGLPaaa % caGGSaGaamOqamaabmaabaGaaGimaiaacUdacaWGIbGaai4oaiaaic % daaiaawIcacaGLPaaacaGGSaGaam4qamaabmaabaGaaGimaiaacUda % caaIWaGaai4oaiaadogaaiaawIcacaGLPaaaaaa!49CE! A\left( {a;0;0} \right),B\left( {0;b;0} \right),C\left( {0;0;c} \right)\) và a,b,c dương. Biết rằng khi A,B,C di động trên các tia Ox,Oy,Oz sao cho a+b+c=2018 và khi a,b,c thay đổi thì quỹ tích tâm hình cầu ngoại tiếp tứ diện OABC luôn thuộc mặt phẳng (P) cố định. Tính khoảng cách từ M(1;0;0) tới mặt phẳng (P).
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGymaiaaiA % dacaaI4aWaaOaaaeaacaaIZaaaleqaaaaa!3908! 168\sqrt 3 \)
B. \(336\sqrt 3 \)
C. \(1009\sqrt 3 \)
D. \(2018\sqrt 3 \)
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Câu 47:
Cho hàm số y = f(x) có đồ thị như hình vẽ. Trong đoạn [-20;20], có bao nhiêu số nguyên m để hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9maaemaabaGaaGymaiaaicdacaWGMbWaaeWaaeaacaWG4bGaeyOe % I0IaamyBaaGaayjkaiaawMcaaiabgkHiTmaalaaabaGaaGymaiaaig % daaeaacaaIZaaaaiaad2gadaahaaWcbeqaaiaaikdaaaGccqGHRaWk % daWcaaqaaiaaiodacaaI3aaabaGaaG4maaaacaWGTbaacaGLhWUaay % jcSdaaaa!4B12! y = \left| {10f\left( {x - m} \right) - \frac{{11}}{3}{m^2} + \frac{{37}}{3}m} \right|\)có 3 điểm cực trị?
A. 36.
B. 32.
C. 40.
D. 34.
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Câu 48:
Cho các số thực dương x;y thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaG4maiaadI % hadaahaaWcbeqaaiaaikdaaaGccaWG5bWaaeWaaeaacaaIXaGaey4k % aSYaaOaaaeaacaaI5aGaamyEamaaCaaaleqabaGaaGOmaaaakiabgU % caRiaaigdaaSqabaaakiaawIcacaGLPaaacqGH9aqpcaaIYaGaamiE % aiabgUcaRiaaikdadaGcaaqaaiaadIhadaahaaWcbeqaaiaaikdaaa % GccqGHRaWkcaaI0aaaleqaaaaa!4942! 3{x^2}y\left( {1 + \sqrt {9{y^2} + 1} } \right) = 2x + 2\sqrt {{x^2} + 4} \). Giá trị nhỏ nhất của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiuaiabg2 % da9iaadIhadaahaaWcbeqaaiaaiodaaaGccqGHsislcaaIXaGaaGOm % aiaadIhadaahaaWcbeqaaiaaikdaaaGccaWG5bGaey4kaSIaaGinaa % aa!40B1! P = {x^3} - 12{x^2}y + 4\) là \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGHbGaey4kaSIaamOyamaakaaabaGaaGOnaaWcbeaaaOqaaiaadoga % aaWaaeWaaeaacaWGHbGaaiilaiaadkgacaGGSaGaam4yaiabgIGiol % ablssiIcGaayjkaiaawMcaaaaa!4319! \frac{{a + b\sqrt 6 }}{c}\left( {a,b,c \in Z} \right )\) . Tính \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGHbGaey4kaSIaamOyaaqaaiaadogaaaaaaa!399A! \frac{{a + b}}{c}\).
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI0aaabaGaaGyoaaaaaaa!3784! \frac{4}{7}\)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI0aaabaGaaGyoaaaaaaa!3784! \frac{4}{9}\)
C. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI0aaabaGaaGyoaaaaaaa!3784! \frac{3}{5}\)
D. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI0aaabaGaaGyoaaaaaaa!3784! \frac{5}{9}\)
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Câu 49:
: Trong các số phức z thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaWbaaSqabeaacaaIYaaaaOGaey4kaSIaaGymaaGaay5bSlaa % wIa7aiabg2da9iaaikdadaabdaqaaiaadQhaaiaawEa7caGLiWoaaa % a!4287! \left| {{z^2} + 1} \right| = 2\left| z \right|\) gọi \(z_1\) và \(z_2\) lần lượt là các số phức có môđun nhỏ nhất và lớn nhất. Giá trị của biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca % WG6bWaaSbaaSqaaiaaigdaaeqaaaGccaGLhWUaayjcSdWaaWbaaSqa % beaacaaIYaaaaOGaey4kaSYaaqWaaeaacaWG6bWaaSbaaSqaaiaaik % daaeqaaaGccaGLhWUaayjcSdWaaWbaaSqabeaacaaIYaaaaaaa!42D6! {\left| {{z_1}} \right|^2} + {\left| {{z_2}} \right|^2}\) bằng
A. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmamaaka % aabaGaaGOmaaWcbeaaaaa!3786! 2\sqrt 2 \)
B. \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmamaaka % aabaGaaGOmaaWcbeaaaaa!3786! 4\sqrt 2 \)
C. 6
D. 2
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Câu 50:
Cho hình vuông ABCD có cạnh bằng 2. Trên cạnh AB lấy hai điểm M,N (M nằm giữa A,N) sao cho MN =1. Quay hình thang MNCD quanh cạnh CD được vật thể tròn quay. Giá trị nhỏ nhất của diện tích toàn phần vật tròn xoay đó gần giá trị nào nhất dưới đây?
A. 36
B. 40
C. 32
D. 45