Do you need to buy a new problem set for the postgraduate entrance examination? Can I use last year's video lesson?
Whether it's a problem set or a video, just use the old one. The mathematics syllabus for postgraduate entrance examination has not changed for four or five years, and the content is completely consistent. And the key and difficult points of mathematics are just those, such as integral, limit and so on. You must take the exam every year, and it must be the top priority of the exam. Unlike the hot political issues every year, you have to buy the latest information.