Not knowing math is not that you can't do math problems, but that you don't use the right method! ! ! In fact, the key to the course of mathematics is understanding and application, but it is useless to memorize the theorems in the book. The simplest and most effective way is to do more questions. Now that I have entered the university, I regret that I have not laid a good foundation in mathematics. It's too painful to learn advanced mathematics now. I learned a lot of knowledge before, but I can't, so I suggest that the landlord must do more math problems in his spare time and understand and digest all the theorems. As long as the foundation is solid, no matter what problem he does, he will be able to solve it smoothly with the right method. Finally, I wish the landlord a smooth postgraduate entrance examination ~ thank you