∫x的三次方e的x的二次方dx 怎么求?
问题描述:
∫x的三次方e的x的二次方dx 怎么求?
答
原式=(1/2)∫x^2[e^(x^2)]d(x^2)
=(1/2)∫x^2[e^(x^2)]
=(1/2)x^2[e^(x^2)]-(1/2)∫[e^(x^2)]d(x^2)
=(1/2)x^2[e^(x^2)]-(1/2)e^(x^2)+C