Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9maalaaabaGaamiEamaaCaaaleqabaaeaaaaaaaaa8qacaaIYaaa % aOGaey4kaSIaamiEaaWdaeaacaWG4bGaeyOeI0IaaGOmaaaaaaa!3EAC! y = \frac{{{x^2} + x}}{{x - 2}}\) đạo hàm của hàm số tại x = 1 là:
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Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmyEayaafa % Gaeyypa0ZaaSaaaeaadaqadaqaaiaaikdacaWG4bGaey4kaSIaaGym % aaGaayjkaiaawMcaamaabmaabaGaamiEaiabgkHiTiaaikdaaiaawI % cacaGLPaaacqGHsisldaqadaqaaiaadIhadaahaaWcbeqaaabaaaaa % aaaapeGaaGOmaaaakiabgUcaRiaadIhaa8aacaGLOaGaayzkaaaaba % WaaeWaaeaacaWG4bGaeyOeI0IaaGOmaaGaayjkaiaawMcaamaaCaaa % leqabaWdbiaaikdaaaaaaOWdaiabg2da9maalaaabaGaamiEamaaCa % aaleqabaWdbiaaikdaaaGccqGHsislcaaI0aGaamiEaiabgkHiTiaa % ikdaa8aabaWaaeWaaeaacaWG4bGaeyOeI0IaaGOmaaGaayjkaiaawM % caamaaCaaaleqabaWdbiaaikdaaaaaaaaa!5975! y' = \frac{{\left( {2x + 1} \right)\left( {x - 2} \right) - \left( {{x^2} + x} \right)}}{{{{\left( {x - 2} \right)}^2}}} = \frac{{{x^2} - 4x - 2}}{{{{\left( {x - 2} \right)}^2}}}\)
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaccaGae8N0H4 % TabmyEayaafaWaaeWaaeaacaaIXaaacaGLOaGaayzkaaGaeyypa0Ja % eyOeI0IaaGynaaaa!3E54! \Rightarrow y'\left( 1 \right) = - 5\)