Đạo hàm của hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzaiaacI % cacaWG4bGaaiykaiabg2da9maalaaabaGaeyOeI0IaaG4maiaadIha % cqGHRaWkcaaI0aaabaGaaGOmaiaadIhacqGHRaWkcaaIXaaaaaaa!41E8! f(x) = \frac{{ - 3x + 4}}{{2x + 1}}\) tại điểm x = -1 là
Suy nghĩ và trả lời câu hỏi trước khi xem đáp án
Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOzayaafa % WaaeWaaeaacaWG4baacaGLOaGaayzkaaGaeyypa0ZaaSaaaeaacqGH % sislcaaIXaGaaGymaaqaamaabmaabaGaaGOmaiaadIhacqGHRaWkca % aIXaaacaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaaaakiabgkDi % ElqadAgagaqbamaabmaabaGaeyOeI0IaaGymaaGaayjkaiaawMcaai % abg2da9maalaaabaGaeyOeI0IaaGymaiaaigdaaeaacaaIXaaaaiab % g2da9iabgkHiTiaaigdacaaIXaaaaa!50DE! f'\left( x \right) = \frac{{ - 11}}{{{{\left( {2x + 1} \right)}^2}}} \Rightarrow f'\left( { - 1} \right) = \frac{{ - 11}}{1} = - 11\)