Tích phân \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaada % WcaaqaaiaaigdaaeaadaGcaaqaaiaadIhacqGHRaWkcaaIXaaaleqa % aaaakiaabsgacaWG4baaleaacaaIWaaabaGaaGymaaqdcqGHRiI8aa % aa!3F3F! \int\limits_0^1 {\frac{1}{{\sqrt {x + 1} }}{\rm{d}}x} \) bằng
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Lời giải:
Báo saiTa có \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaada % WcaaqaaiaaigdaaeaadaGcaaqaaiaadIhacqGHRaWkcaaIXaaaleqa % aaaakiaabsgacaWG4baaleGabaWoaiaaicdaaeaacaaIXaaaniabgU % IiYdGccqGH9aqpcaaIYaWaa8qCaeaadaWcaaqaaiaaigdaaeaacaaI % YaWaaOaaaeaacaWG4bGaey4kaSIaaGymaaWcbeaaaaGccaqGKbWaae % WaaeaacaWG4bGaey4kaSIaaGymaaGaayjkaiaawMcaaaWcbiqaaSda % caaIWaaabaGaaGymaaqdcqGHRiI8aOGaeyypa0ZaaqGaaeaacaaIYa % WaaOaaaeaacaWG4bGaey4kaSIaaGymaaWcbeaaaOGaayjcSdWaa0ba % aSqaaiaaicdaaeaacaaIXaaaaOGaeyypa0JaaGOmamaabmaabaWaaO % aaaeaacaaIYaaaleqaaOGaeyOeI0IaaGymaaGaayjkaiaawMcaaaaa % !5C56! \int\limits_0^1 {\frac{1}{{\sqrt {x + 1} }}{\rm{d}}x} = 2\int\limits_0^1 {\frac{1}{{2\sqrt {x + 1} }}{\rm{d}}\left( {x + 1} \right)} = \left. {2\sqrt {x + 1} } \right|_0^1 = 2\left( {\sqrt 2 - 1} \right)\)