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苏教版普通高中课程标准实验教科书数学(必修1)中,涉及了高中数学中的重要函数模型——分段函数.这一模型充分体现了高中数学中的分类讨论、数形结合的数学思想.但教科书中只以例题形式出现,并没有深入系统地介绍,导致不少学生对其认识肤浅模糊,解题中时常出现这样那样的错误.本文就分段函数问题的特点和应用作一介绍,供参考.一、分段函数的定义及特点分段函数是指表达式分段表示的函数.
Supibiao ordinary high school curriculum standard experimental textbook mathematics (compulsory 1), relates to the high school mathematics important function model - segmentation function.This model fully reflects the classification of high school mathematics discussion mathematical mathematical combination However, textbooks only appear in the form of examples, which are not introduced systematically in depth, causing many students to make superficial mistakes in their understanding, which often lead to such mistakes in solving problems.This paper introduces the features and applications of the piecewise function problems , For reference. A definition and characteristics of the piecewise function Subsection function is expressed as a function of the sub-expression.