分部积分法是积分运算的基本方法之一，而 u和 dv 的适当选取则是掌握分部积分法的重点和关键。对于一般难度的分部积分问题，本文介绍一种快速选取 u和dv的方法---“反对幂指三”法。%The integration by parts is an essential method of integral operation ,while the suitable se-lection of “u”and“dv”is the key to grasping the integration by par .In terms of general integration by parts ,this article introduced a simple kind of selecting “u”and “dv” ,that is ,“T he method for inverse trigonometrial function ,power funtion and direct trigonometic”.
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