① Function This part is the part that junior high school must learn well. The direct and inverse proportional functions of linear function and quadratic function are the key points, but in comparison, I think it is still quadratic function, symmetry axis and opening problem. What other range problems are greater than 0 and less than 0 need to be clarified. In the exam, the remaining functions are basically combined with practical application problems and cannot be sloppy. The main thing is to remember the formula well and then try to consolidate the problem. The function of junior high school is still relatively dead, and the questions are relatively simple.

(2) geometry this part is difficult, simple is not very simple. You should pay attention to the proof of quadrilateral, and then the knowledge points of circle will be repeated. There are many knowledge points in the circle. You should remember many of its theorems and do many problems to consolidate it. Basically, you should know what theorem to use when you see the topic, which will be very quick and dead. It's easy to do too much. Besides, the senior high school entrance examination will not be particularly difficult for you in calculation. You just need to put the method.

③ The combination of function and geometry is mainly reflected in the problem of moving circle. This topic is generally divided into three questions. The first question is relatively simple, the second question has a moderate difficulty coefficient, and the third question is more troublesome. Basically, it is a combination of a function and a circle, and the motion of the fixed point on the circle should be considered. However, the circle is symmetrical. In fact, as long as you know the method and know how to use compasses, it is easy to have several situations, and then there is the problem of calculation.

Generally speaking, junior high school mathematics topics are relatively simple, whether it is function or geometry. As long as you practice more, you will get good grades!