(x∧2)lnxdx的不定积分是
问题描述:
(x∧2)lnxdx的不定积分是
答
∫ x^2*lnx dx = ∫ lnx d(x^3/3) = (1/3)x^3lnx - (1/3)∫ x^3 dlnx
= (1/3)x^3lnx - (1/3)∫ x^2 dx = (1/3)x^3lnx - (1/9)x^3 + C