Extreme value analysis (also called dynamic analysis): calculate the value of the endpoint to determine the answer, simplify the problem, or analyze special situations, such as the case where a straight line is just tangent to a circle. Another example is to calculate the value of the midpoint. ? This method is suitable for geometric problems: circle, similar triangles and so on.

Algebra method: a common method in competitions. As the name implies, this method is suitable for the type of pure algebra problems, but there are few such choices in the senior high school entrance examination.

Combination of numbers and shapes: This method is very abstract. I mean, when you do multiple-choice questions, you always draw a situation map. You can use sketches for the first few questions, but generally you need to draw a standard one for the final choice question. If the error is not big, it will also help solve the problem, especially? This method is a quadratic function problem and a geometric synthesis problem.

Specific analysis method: the deepening of algebraic method is to take relatively simple specific data (data should meet the conditions) for calculation, find the law through the results, and then get abstract conclusions more suitable for solving problems.

In short, please solve the problem calmly and believe in yourself.