函数是高中数学的重点考察内容,每年全国各个省份高考数学试题都有很多关于函数知识的考察;但很多学生遇到函数问题感觉无从下手,不知道题目到底考察的是什么知识点,找不到解题的突破口。笔者认为,这些问题大部分都是因为对函数概念理解不够透彻造成的。本文探索了函数概念的教学以及借助函数的性质解决常见问题的一些方法和技巧。函数的概念:设A,B是非空的数集,如果按照某种确定的对应关系f,使对于集合A中的任意一个数x,在集合B中都有唯一确定的数f(x)和它对应,那么就称f:A→B为从集合A到集合 Function is the focus of high school mathematics study content, each year the national college entrance examination math test has a lot of knowledge on the function of inspection; but many students feel the function of the problem can not start, do not know the problem in the end what is the point of knowledge, can not find Problem-solving breakthrough. The author believes that most of these problems are caused by the lack of thorough understanding of the concept of the function. This article explores the teaching of function concepts and some methods and techniques for solving common problems with the nature of functions. Function concept: Suppose A, B is a non-empty number set, if according to a certain correspondence f, for any number x in the set A, there is a uniquely determined number f (x) and It corresponds, then say f: A → B from the collection A to the collection