把两个变量的函数关系,用一个等式来表示,这个等式叫函数的解析式,简称解析式。在给定条件下求函数的解析式(fx),是高中数学中经常涉及的内容,形式多样,没有一定的程序可循,综合性强,解起来有相当的难度,但是只要认真仔细去探索,还是有一些常用之法。下面就谈谈求函数解析式(fx)的方法。一、待定系数法适用范围:在已知函数解析式的构造时,可用待定系数法。 The two variables of the functional relationship, with an equation to represent, this equation is called analytic function, referred to as analytic. In a given condition, the analytic formula (fx) of finding a function is often involved in high school mathematics. It has various forms and no certain procedures to follow. It is quite comprehensive and difficult to solve. However, as long as you carefully and carefully explore , There are still some commonly used method. Now let’s talk about how to find the function resolution (fx). First, to be determined coefficient method Scope: In the known function analytic structure, the coefficient method to be determined.