Tính tích phân \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamysaiabg2 % da9maapehabaWaaeWaaeaacaaIYaGaamiEaiabgUcaRiaaigdaaiaa % wIcacaGLPaaacaqGKbGaamiEaaWcbaGaaGimaaqaaiaaigdaa0Gaey % 4kIipaaaa!4269! I = \int\limits_0^1 {\left( {2x + 1} \right){\rm{d}}x} \)

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