1, it is ok to prepare for the postgraduate entrance examination mathematics from the sophomore year, but it is suggested that it is best to prepare from the junior year, because it is completely enough to spend one year preparing for the postgraduate entrance examination, and it is not difficult to take the postgraduate entrance examination mathematics. Moreover, in my sophomore year, when I was studying professional courses, I had little time to arrange freely. You also need to prepare for some professional level exams. Therefore, instead of spending a little time preparing, it is better to spend a lot of time preparing for the postgraduate entrance examination in junior year.

2. According to the different requirements of various disciplines and majors on the mathematical knowledge and ability that graduate students should have when entering the postgraduate entrance examination, the postgraduate entrance examination papers are divided into three types: engineering mathematics ⅰ and mathematics ⅱ; Mathematics III is aimed at economic management. There are specific regulations on the types of test papers used by different majors.