Don't worry, I'm a 12 candidate. According to my experience, the math in the college entrance examination will be simpler than the questions given by the teacher at ordinary times, mainly to adjust the mentality. Derivative is the key, but it is not difficult. As long as you do more questions and master more skills, you may find that you have seen such questions in the college entrance examination. Geometric analysis mainly depends on the properties of ellipse, hyperbola and parabola, and there are also some.