Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 % qacaWG5bGaeyypa0ZaaSaaaeaacaaIXaaabaGaaG4maaaacaWG4bWd % amaaCaaaleqabaWdbiaaiodaaaGccaGGtaIaaG4maiaadIhapaWaaW % baaSqabeaapeGaaGOmaaaakiabgUcaRiaaiEdacaWG4bGaey4kaSIa % aGOmaaaa!4370! y = \frac{1}{3}{x^3}--3{x^2} + 7x + 2\) . Phương trình tiếp tuyến tại A(0;2) là:
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Lời giải:
Báo saiTa có :\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmyEayaafa % Gaeyypa0JaamiEamaaCaaaleqabaaeaaaaaaaaa8qacaaIYaaaaOGa % eyOeI0IaaGOnaiaadIhacqGHRaWkcaaI3aaaaa!3E61! y' = {x^2} - 6x + 7\)
Hệ số góc tiếp tuyến y'(0) = 7
Phương trình tiếp tuyến tại A(0;2)
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9iaaiEdadaqadaqaaiaadIhacqGHsislcaaIWaaacaGLOaGaayzk % aaGaey4kaSIaaGOmaiabg2da9iaaiEdacaWG4bGaey4kaSIaaGOmaa % aa!42E6! y = 7\left( {x - 0} \right) + 2 = 7x + 2\)
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