Read the textbook first. After reading it, you will find that your review of the title of the whole book is still not very good, and then you will mainly do the whole book. If you are not good at math and can't read and analyze the textbook carefully, I suggest that the textbook time can be less, three months. If you are impressed with mathematics, you can reduce it appropriately. I mean, from now on, get a general understanding, and then do math books again and again. Personally, I think the math book is well summarized and the questions are also very good. I have to do it repeatedly to understand him. Although Daniel said it was the evolution of examples in textbooks, I personally think this evolution is too ugly.