抽象型函数通常是指没有给出函数的具体解析式,只给出了其他一些条件(如函数的定义域、经过的特殊点、解析递推式、部分图象特征等)的函数问题,它是高中数学函数部分的难点,也是高中与大学函数部分的一个衔接点.因为抽象函数无具体解析式,所以理解、研究起来往往困难重重.但是这类问题对于培养学生的创新精神和实践能力,增强用数 The abstract function usually refers to the specific analytical method that does not give the function, and only gives some other conditions (such as the definition of the function domain, passing special points, recursive parsing, partial image features, etc.). It is a difficult part of the high school mathematics function, and it is also a point of convergence between the high school and the university function. Because the abstract function has no specific analytical formula, it is often difficult to understand and research. However, such problems are to cultivate students’ innovative spirit and practical ability. Enhanced number