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抽象函数一般指的是未给出函数解析式与图象的函数．抽象函数问题在近几年各地练习与考试中频繁出现．为了让大家对此类问题有一个比较全面、清晰的认识,本文就若干题型作一梳理与解析．
The abstract function generally refers to a function that does not give the analytical expression of the function and the image. Abstract function problems have appeared frequently in practice and examinations in recent years. In order to let everyone have a more comprehensive and clear understanding of this kind of problem, this article will sort out and analyze a number of questions.