分段函数在教材中是以例题的形式出现的,并未作深入研究,更没有举例说明应用.同学们对此认识不足,甚至不理解,因此,对分段函数进行解读无疑是十分必要的.“分段函数”是指在定义域的不同部分,有不同对应法则的函数.对它应有以下两点基本认识和理解.1.分段函数是一个函数,不是几个函数;2.分段函数的定义域是各段定义域的并 The function of segmentation appears in the form of examples in the textbooks. It has not been studied in depth, and there is no example to illustrate the application. The students lacked understanding or even did not understand it. Therefore, it is necessary to interpret the segmentation function. .“Segment function” refers to a function that has different corresponding rules in different parts of the domain. It should have the following two basic understandings and understandings: 1. A piecewise function is a function, not a few functions; 2. The domain of the segmentation function is the definition of the domain and