Biết \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaa8qCaeaada % WcaaqaaiGacYgacaGGUbGaamiEaaqaamaakaaabaGaamiEaaWcbeaa % aaGccaqGKbGaamiEaaWcbaGaaGymaaqaaiaadwgaa0Gaey4kIipaki % abg2da9iaadggadaGcaaqaaiaadwgaaSqabaGccqGHRaWkcaWGIbaa % aa!44C6! \int\limits_1^e {\frac{{\ln x}}{{\sqrt x }}{\rm{d}}x} = a\sqrt e + b\) với a, b thuộc Z . Tính P = ab

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