Biết một nguyên hàm của hàm số f(x) là \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOramaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaadIhadaahaaWcbeqa % aiaaikdaaaGccqGHRaWkcaaI0aGaamiEaiabgUcaRiaaigdaaaa!4075! F\left( x \right) = {x^2} + 4x + 1\). Khi đó, giá trị của hàm số y = f(x) tại x =3 là.
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Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabmOrayaafa % WaaeWaaeaacaWG4baacaGLOaGaayzkaaGaeyypa0JaamOzamaabmaa % baGaamiEaaGaayjkaiaawMcaaiabgkDiElaadAgadaqadaqaaiaadI % haaiaawIcacaGLPaaacqGH9aqpdaqadaqaaiaadIhadaahaaWcbeqa % aiaaikdaaaGccqGHRaWkcaaI0aGaamiEaiabgUcaRiaaigdaaiaawI % cacaGLPaaadaahaaWcbeqaaOGamai4gkdiIcaacqGH9aqpcaaIYaGa % amiEaiabgUcaRiaaisdaaaa!53CD! F'\left( x \right) = f\left( x \right) \Rightarrow f\left( x \right) = {\left( {{x^2} + 4x + 1} \right)^\prime } = 2x + 4\)
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaaG4maaGaayjkaiaawMcaaiabg2da9iaaikdacaGGUaGaaG4m % aiabgUcaRiaaisdacqGH9aqpcaaIXaGaaGimaaaa!4071! f\left( 3 \right) = 2.3 + 4 = 10\)