反函数概念是中学教学的一个难点 ,尽管教学要求不高 ,但是作为教师 ,全面理解也是必要的 ,而且有助于提高尖子生的概念理解能力 下面从几种不同的角度来认识这一概念 1　从对应的观点看从初中到高中 ,函数概念已由变量的描述性依赖关系转变为集合间的对应关系 因此 ,作为教 The concept of anti-function is a difficult point in the teaching of middle school. Although teaching requirements are not high, but as a teacher, a comprehensive understanding is also necessary, and it helps to improve the conceptual understanding of top students. The following concept is known from several different perspectives. From the corresponding point of view, from the junior high school to the high school, the concept of the function has changed from the descriptive dependency of the variable to the correspondence between the sets.