反函数是中学数学的重要内容 ,是函数部分的难点 ,高一学生初次接触这一内容时 ,学习和理解都比较困难 .为了帮助学生理解这部分内容 ,培养学生的理解能力和判断能力 .本文就现行教材中的反函数问题进行解读 .一、定义设函数 ｙ =ｆ(ｘ) (ｘ∈Ａ)的值域为Ｄ .根据这个函数中ｘ Inverse function is an important part of middle school mathematics, and it is a difficult part of the function. When a high school student first touches this content, it is difficult to learn and understand. In order to help students understand this part, cultivate students’ understanding ability and judgment ability. Explain the inverse function problem in the current textbook. First, define the value range for the function y = f(x) (x∈A) as D. According to this function x