If your goal is the senior high school entrance examination, you'd better know about the function, which runs through the whole high school mathematics. For example, the derivative of plane geometry is inseparable from the idea of function. The scores of these four plates in the joint exam are quite large, and solid geometry is generally not too difficult. It's just a verification. Plane geometry is complicated to calculate. In fact, as long as the internal relationship is clear, the function is the most important and basic, and there are also series and trigonometric functions in the entrance examination paper. ! I hope it helps you!