Cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9maabmaabaGaamiEaiab % gkHiTiaaigdaaiaawIcacaGLPaaadaahaaWcbeqaaiaaiodaaaGccq % GHsislcaaIZaGaamiEaiabgUcaRiaaiodaaaa!43D3! f\left( x \right) = {\left( {x - 1} \right)^3} - 3x + 3\). Đồ thị hình bên là của hàm số có công thức:
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Lời giải:
Báo saiĐáp án A: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iabgkHiTiaadAgadaqadaqaaiaadIhacqGHRaWkcaaIXaaacaGL % OaGaayzkaaGaeyOeI0IaaGymaiabg2da9iabgkHiTiaadIhadaahaa % WcbeqaaiaaiodaaaGccqGHsislcaaIZaWaaeWaaeaacaWG4bGaey4k % aSIaaGymaaGaayjkaiaawMcaaiabgUcaRiaaiodacqGHsislcaaIXa % Gaeyypa0JaeyOeI0IaamiEamaaCaaaleqabaGaaG4maaaakiabgkHi % TiaaiodacaWG4bGaeyOeI0IaaGymaaaa!54C6! y = - f\left( {x + 1} \right) - 1 = - {x^3} - 3\left( {x + 1} \right) + 3 - 1 = - {x^3} - 3x - 1\). Đồ thị hàm số đi qua điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIWaGaai4oaiabgkHiTiaaigdaaiaawIcacaGLPaaacqGHshI3aaa!3CFB! \left( {0; - 1} \right) \Rightarrow \) Loại.
Đáp án B: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iabgkHiTiaadAgadaqadaqaaiaadIhacqGHRaWkcaaIXaaacaGL % OaGaayzkaaGaey4kaSIaaGymaiabg2da9iabgkHiTiaadIhadaahaa % WcbeqaaiaaiodaaaGccqGHsislcaaIZaWaaeWaaeaacaWG4bGaey4k % aSIaaGymaaGaayjkaiaawMcaaiabgUcaRiaaiodacqGHRaWkcaaIXa % Gaeyypa0JaeyOeI0IaamiEamaaCaaaleqabaGaaG4maaaakiabgUca % RiaaiodacaWG4bGaey4kaSIaaGymaaaa!549A! y = - f\left( {x + 1} \right) + 1 = - {x^3} - 3\left( {x + 1} \right) + 3 + 1 = - {x^3} + 3x + 1\). Đồ thị hàm số đi qua điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIWaGaai4oaiaaigdaaiaawIcacaGLPaaacqGHshI3aaa!3C0E! \left( {0;1} \right) \Rightarrow \) Đáp án B có thể đúng.
Đáp án C: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iabgkHiTmaabmaabaGaamiEaiabgkHiTiaaikdaaiaawIcacaGL % PaaadaahaaWcbeqaaiaaiodaaaGccqGHsislcaaIZaWaaeWaaeaaca % WG4bGaeyOeI0IaaGymaaGaayjkaiaawMcaaiabgkHiTiaaigdacqGH % 9aqpcqGHsislcaWG4bWaaWbaaSqabeaacaaIZaaaaOGaey4kaSIaaG % OnaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHsislcaaIXaGaaGyn % aiaadIhacqGHRaWkcaaIXaGaaGimaiabg2da9iaaicdaaaa!5479! y = - {\left( {x - 2} \right)^3} - 3\left( {x - 1} \right) - 1 = - {x^3} + 6{x^2} - 15x + 10 = 0\). Đồ thị hàm số đi qua điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIWaGaai4oaiaaigdacaaIWaaacaGLOaGaayzkaaGaeyO0H4naaa!3CC8! \left( {0;10} \right) \Rightarrow \) Loại.
Đáp án D:\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iabgkHiTmaabmaabaGaamiEaiabgkHiTiaaikdaaiaawIcacaGL % PaaadaahaaWcbeqaaiaaiodaaaGccqGHsislcaaIZaWaaeWaaeaaca % WG4bGaeyOeI0IaaGymaaGaayjkaiaawMcaaiabgUcaRiaaigdacqGH % 9aqpcqGHsislcaWG4bWaaWbaaSqabeaacaaIZaaaaOGaey4kaSIaaG % OnaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHsislcaaIXaGaaGyn % aiaadIhacqGHRaWkcaaIXaGaaGOmaiabg2da9iaaicdaaaa!5470! y = - {\left( {x - 2} \right)^3} - 3\left( {x - 1} \right) + 1 = - {x^3} + 6{x^2} - 15x + 12 = 0\) . Đồ thị hàm số đi qua điểm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIWaGaai4oaiaaigdacaaIYaaacaGLOaGaayzkaaGaeyO0H4naaa!3CCA! \left( {0;12} \right) \Rightarrow \) Loại.
Đề thi thử tốt nghiệp THPT QG môn Toán năm 2020
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