Tính đạo hàm của hàm số sau: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiabg2 % da9maakaaabaGaci4CaiaacMgacaGGUbGaamiEaiabgUcaRiaaikda % caWG4baaleqaaaaa!3E83! y = \sqrt {\sin x + 2x} \)
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Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyEaiaacE % cacqGH9aqpdaWcaaqaamaabmaabaGaci4CaiaacMgacaGGUbGaamiE % aiabgUcaRiaaikdacaWG4baacaGLOaGaayzkaaWaaWbaaSqabeaaca % GGVaaaaaGcbaGaaGOmamaakaaabaGaci4CaiaacMgacaGGUbGaamiE % aiabgUcaRiaaikdacaWG4baaleqaaaaakiabg2da9maalaaabaGaci % 4yaiaac+gacaGGZbGaamiEaiabgUcaRiaaikdaaeaacaaIYaWaaOaa % aeaaciGGZbGaaiyAaiaac6gacaWG4bGaey4kaSIaaGOmaiaadIhaaS % qabaaaaOGaaiOlaaaa!576E! y' = \frac{{{{\left( {\sin x + 2x} \right)}^/}}}{{2\sqrt {\sin x + 2x} }} = \frac{{\cos x + 2}}{{2\sqrt {\sin x + 2x} }}.\)