Nếu \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaaca % WG4bGaamyzamaaCaaaleqabaGaamiEaaaakiaabsgacaWG4baaleaa % caaIWaaabaGaamyyaaqdcqGHRiI8aOGaeyypa0JaaGymaaaa!40C7! \int\limits_0^a {x{e^x}{\rm{d}}x} = 1\) thì giá trị của a bằng bao nhiêu
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Lời giải:
Báo sai\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaaca % WG4bGaamyzamaaCaaaleqabaGaamiEaaaakiaabsgacaWG4baaleaa % caaIWaaabaGaamyyaaqdcqGHRiI8aOGaeyypa0JaaGymaiabgsDiBp % aaeiaabaWaaeWaaeaacaWG4bGaeyOeI0IaaGymaaGaayjkaiaawMca % aiaadwgadaahaaWcbeqaaiaadIhaaaaakiaawIa7amaaDaaaleaaca % aIWaaabaGaamyyaaaakiabg2da9maabmaabaGaamyyaiabgkHiTiaa % igdaaiaawIcacaGLPaaacaWGLbWaaWbaaSqabeaacaWGHbaaaOGaey % 4kaSIaaGymaiabg2da9iaaigdacqGHuhY2caWGHbGaeyypa0JaaGym % aaaa!5C61! \int\limits_0^a {x{e^x}{\rm{d}}x} = 1 \Leftrightarrow \left. {\left( {x - 1} \right){e^x}} \right|_0^a = \left( {a - 1} \right){e^a} + 1 = 1 \Leftrightarrow a = 1\)