Tìm họ nguyên hàm của hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iaadIhacqGHRaWkciGG % JbGaai4BaiaacohacaWG4baaaa!401A! f\left( x \right) = x + \cos x\)
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Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qaaeaaca % WGMbWaaeWaaeaacaWG4baacaGLOaGaayzkaaGaaeizaiaadIhaaSqa % beqaniabgUIiYdGccqGH9aqpdaWdbaqaamaabmaabaGaamiEaiabgU % caRiGacogacaGGVbGaai4CaiaadIhaaiaawIcacaGLPaaacaqGKbGa % amiEaaWcbeqab0Gaey4kIipakiabg2da9maalaaabaGaamiEamaaCa % aaleqabaGaaGOmaaaaaOqaaiaaikdaaaGaey4kaSIaci4CaiaacMga % caGGUbGaamiEaiabgUcaRiaadoeaaaa!5398! \int {f\left( x \right){\rm{d}}x} = \int {\left( {x + \cos x} \right){\rm{d}}x} = \frac{{{x^2}}}{2} + \sin x + C\)