函数的思想,是运用运动和变化的观点,集合与对应的思想,去分析和研究数学问题中的数量关系,建立函数关系和构造函数,运用函数的图象和性质去分析问题、转化问题,从而使问题得到解决。方程的思想,就是分析数学问题中的变量间的等量关系,从而建立方程或方程组,或着构造方程,通过 The idea of ​​function is to use the viewpoint of movement and change, the collection and the corresponding thought, to analyze and study the quantitative relationship among mathematical problems, to establish the function relation and the constructor, to use the image and nature of the function to analyze and transform the problem, So that the problem can be solved. The idea of ​​the equation is to analyze the equivalence relations among the variables in the mathematical problem so as to establish equations or equations or construct equations by