Function, monotonicity, finding the best value and other knowledge points, and at the same time, you should read the book thoroughly. If you can't, you should ask teachers and classmates for help in time. Prevent problems that you don't understand from accumulating, and then you will feel tired of learning.
The following is a set of questions about the mathematical model of Shanghai college entrance examination in 2020. You can try to brush it, and the teacher will explain it in detail.
Anyone who doesn't understand can ask the teacher for help. Mathematical model of 2020 Shanghai college entrance examination
Three years in high school is difficult, and everyone has to go through it. I hope you can make it.