Cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGacaGaaiaabeqaamaabaabaaGcbaWaa8qaaeaaca % WGMbWaaeWaaeaacaWG4baacaGLOaGaayzkaaGaamizaiaadIhaaSqa % beqaniabgUIiYdGccqGH9aqpdaGcaaqaaiaadIhadaahaaWcbeqaai % aaikdaaaGccqGHRaWkcaaI0aaaleqaaOGaey4kaSIaam4qaaaa!43B3! \int {f\left( x \right)dx} = \sqrt {{x^2} + 4} + C\). Tìm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGacaGaaiaabeqaamaabaabaaGcbaWaa8qaaeaaca % WGMbWaaeWaaeaacaaIYaGaamiEaaGaayjkaiaawMcaaiaadsgacaWG % 4baaleqabeqdcqGHRiI8aaaa!3E00! \int {f\left( {2x} \right)dx} \)
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Lời giải:
Báo saiTa có \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGacaGaaiaabeqaamaabaabaaGcbaWaa8qaaeaaca % WGMbWaaeWaaeaacaaIYaGaamiEaaGaayjkaiaawMcaaiaadsgacaWG % 4baaleqabeqdcqGHRiI8aOGaeyypa0ZaaSaaaeaacaaIXaaabaGaaG % OmaaaacaWGgbWaaeWaaeaacaaIYaGaamiEaaGaayjkaiaawMcaaiab % gUcaRiaadoeacqGH9aqpdaWcaaqaaiaaigdaaeaacaaIYaaaamaaka % aabaGaaGinaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaaI % 0aaaleqaaOGaey4kaSIaam4qaiabg2da9maakaaabaGaamiEamaaCa % aaleqabaGaaGOmaaaakiabgUcaRiaaigdaaSqabaGccqGHRaWkcaWG % dbaaaa!555A! \int {f\left( {2x} \right)dx} = \frac{1}{2}F\left( {2x} \right) + C = \frac{1}{2}\sqrt {4{x^2} + 4} + C = \sqrt {{x^2} + 1} + C\)