求不定积分∫(x^2)sin(3x^3)dx

2025-06-26 07:01:32
推荐回答(1个)
回答1:

∫(x^2)sin(3x^3)dx
=(1/9)∫9x²sin(3x³)dx
=(1/9)∫sin(3x³)d(3x³)
=(-1/9)cos(3x³)+C