Số gia của hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9maalaaabaGaamiEamaa % CaaaleqabaGaaGOmaaaaaOqaaiaaikdaaaaaaa!3D26! f\left( x \right) = \frac{{{x^2}}}{2}\) ứng với số gia \(\Delta x\) của đối số x tại \(x_0 = -1\) là
Suy nghĩ và trả lời câu hỏi trước khi xem đáp án
Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeuiLdqKaam % yEaiabg2da9maalaaabaWaaeWaaeaacqGHsislcaaIXaGaey4kaSIa % euiLdqKaamiEaaGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaaaO % qaaiaaikdaaaGaeyOeI0YaaSaaaeaacaaIXaaabaGaaGOmaaaacqGH % 9aqpdaWcaaqaaiaaigdacqGHRaWkdaqadaqaaiabfs5aejaadIhaai % aawIcacaGLPaaadaahaaWcbeqaaiaaikdaaaGccqGHsislcaaIYaGa % euiLdqKaamiEaaqaaiaaikdaaaGaeyOeI0YaaSaaaeaacaaIXaaaba % GaaGOmaaaacqGH9aqpdaWcaaqaaiaaigdaaeaacaaIYaaaamaabmaa % baGaeuiLdqKaamiEaaGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaa % aakiabgkHiTiabfs5aejaadIhaaaa!5D90! \Delta y = \frac{{{{\left( { - 1 + \Delta x} \right)}^2}}}{2} - \frac{1}{2} = \frac{{1 + {{\left( {\Delta x} \right)}^2} - 2\Delta x}}{2} - \frac{1}{2} = \frac{1}{2}{\left( {\Delta x} \right)^2} - \Delta x\)