用分部积分法求不定积分∫x^2乘以lnx乘以dx

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∫x^2*lnxdx=1/3*∫lnxdx^3=1/3*lnx*x^3-1/3*∫x^3*1/xdx=1/判肢3*lnx*x^3-1/掘告世3*∫x^2dx=1/3*lnx*x^3-1/友歼9*x^3+c

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