1. 1. There are nine chapters in the college entrance examination mathematics, including function, sequence, trigonometric function, plane vector, inequality and solid geometry. It is mainly about the test of function and derivative, which is the core plate of our whole high school stage. This section focuses on two aspects: the properties of the first function, including monotonicity and parity; the second is the solution of the function, focusing on quadratic function and higher-order function, fractional function and some distribution problems.

2. Second: plane vectors and trigonometric functions, focusing on three aspects, one is subtraction and evaluation, and the other is to master formulas and five basic formulas. Secondly, the images and properties of trigonometric functions. This paper focuses on the properties of sine function and cosine function. Thirdly, the triangle is solved by sine theorem and cosine theorem. The difficulty is relatively small.

3. Third: Analytic geometry, which is a headache for us, is the most difficult and computationally intensive question in the whole paper. Of course, for this kind of question type, I have summarized the following five commonly tested questions, including the positional relationship between straight lines and curves mentioned in the first one, which is the most tested content.

4. Fourth, the sequence is an ordered number with a positive integer set or its finite set as its domain. Every number in a series is called an item in this series. The number ranked first is called 1 item of this series, which is usually also called the first item, the number ranked second is called the second item of this series, and so on, and the number ranked n is called the n item of this series, which is usually represented by an.