大量的抽象函数都是以中学阶段所学的基本函数为背景抽象而得,解题时,若能从研究抽象函数的“背景”入手,根据题设中抽象函数的性质,通过类比、猜想出它可能为某种基本函数,常可觅得解题思路.本文从这一认识出发,例谈五种类型的抽象函数问题及其解法.1线性函数型抽象函数线性函 A large number of abstract functions are abstracted from the basic functions learned during the middle school. When solving a problem, if you start from studying the “background” of abstract functions, you can use analogy to guess the nature of abstract functions in the questions. It may be a basic function, and it is often possible to solve problems. This article starts from this understanding and discusses five types of abstract function problems and their solutions.1 Linear functions Abstract functions Linear functions