It is said that no one has created a vocabulary acceptable to Europeans and Americans. The essence of differential method is actually
It is Substitution, and substitution itself is diverse, there are many kinds, and so on.
Feet.
Parts integration (parts integration), things are the same at home and abroad, but step by step at home, no.
Find another way.
The third commonly used method is integration by parts, which is widely used in China.
From high school to university, the algebraic content from the remainder theorem has been systematically ignored, and only a few majors will.
study This part is actually not difficult, but it is ignored.
The fourth method is the complex number method, which is not systematically emphasized in China.
Visually, students majoring in general barely understand complex function.
There are many other ways. Make it clear that you can write for a few days. It's hard to explain it clearly here in a few words.
The only thing that needs to be explained is that these methods are basically the same, and there are generally many product methods for an integral problem.
The landlord only needs to select hundreds of questions and accumulate them in different ways, so that all the questions can be answered!