Okay, now that we've got most of the basic integrals out of the way let's do some indefiniteintegrals.
好吧,现在我们已经得到大部分的基本积分的方式进行,让我们做一些不定积分。
2
The integration by second substitution is an important method of calculating indefinite integral, it has a certain application, it usually applies to calculate some integrals of irrational function.