Mathematics is a highly abstract subject. It is very important to understand the truth, and everything is meaningful. So if you want to learn the most basic things, math is sometimes copied, especially some minor problems. As long as you copy the topic again, it will be difficult to do it. Of course, copying is to list the known key points, think about what you have learned in your mind, and connect them, and then the answer may naturally appear. Of course, it is also important to do more exercises, feel more and accumulate more. Peng should study hard and then forget it. He will come at will during the exam, that is, blend in. If you analyze the logical solution process of the problems you have done and exercise for a long time, your thinking will be natural and you will find your own feeling about mathematics. I believe you can be bathed in the music of mathematics! Go!