函数是中学数学的重要内容 ,对于没有给出函数解析式的问题 ,其抽象程度高 ,综合性、灵活性强 .然而 ,这类题目的设计和编拟 ,都有某个基础函数作模特函数 ,如果我们能找出这个模特函数 ,分析它的图象和性质 ,必将有助于问题的解决 .下面是一些中学数学中常见的模特函数 :1 )若 The function is an important part of middle school mathematics, and it has a high degree of abstraction, comprehensiveness, and flexibility for problems that do not give analytical functions. However, the design and preparation of such topics all have a basic function as a model function. If we can find this model function, analyze its image and nature, it will certainly help solve the problem. Here are some common model functions in middle school math: 1) If