In the process of review, there should be a lot of reference materials. Grasping the foundation is king. After all, mathematics has not been particularly difficult in recent years.

During the exam, I thought about the topic for a few minutes without a clue, and then I quickly did the following, such as the topic of the mean value theorem. Some of them are really difficult, so I quickly did line generation and probability, and then I did it later. Then, if it is a proof problem (usually the mean value theorem), it is very likely that you have an idea but don't know how to do it. Remember to write down your own ideas, even if there are key steps missing, but the conclusion should be written well.