Biết \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaada % WcaaqaaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHRaWkcaWG4bGa % ey4kaSIaaGymaaqaaiaadIhacqGHRaWkcaaIXaaaaiaabsgacaWG4b % Gaeyypa0JaamyyaiabgUcaRiGacYgacaGGUbWaaSaaaeaacaWGIbaa % baGaaGOmaaaaaSqaaiaaiodaaeaacaaI1aaaniabgUIiYdaaaa!4A38! \int\limits_3^5 {\frac{{{x^2} + x + 1}}{{x + 1}}{\rm{d}}x = a + \ln \frac{b}{2}} \) với a, b là các số nguyên. Tính \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9iaadkgadaahaaWcbeqaaiaaikdaaaGccqGHsislcaWGHbaaaa!3B7E! S = {b^2} - a\)

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