“函数与方程”是一种重要数学思想,用它解题的思路是运用运动、变化、联系、对应的观点去分析数学或现实生活中的数量关系,通过构造函数或方程,然后利用函数性质或方程知识去沟通题设和结论的联系,从而使问题得以解决,函数与方程是中学数学 “Functions and equations” is an important mathematical idea. The idea to use it to solve problems is to use motion, change, connection, and corresponding viewpoints to analyze mathematical or real-world quantitative relationships through constructing functions or equations and then using The nature of the function or knowledge of the equation to communicate the connection between the title and the conclusion so that the problem can be solved. The functions and equations are high school mathematics