抽象函数是仅给出定义、性质,而未给出具体函数解析式的一种函数.此类题的特点是信息量大、综合性强、抽象程度高,它符合多考思维、少考运算的时代特征.因此,它常以不同的题目类型活跃在各级各类的试卷上.由于此类题涉及内容丰富(函数、方程、不等式等)且蕴含多种数学思想,它也 An abstract function is a function that only gives definitions and properties, but does not give the analytical function of a specific function. The characteristics of such questions are large amount of information, strong comprehensiveness, and high degree of abstraction. It is consistent with multi-examination thinking and less examination operations. The characteristics of the times. Therefore, it is often active on different types of examination papers with different topic types. Because such questions involve rich content (functions, equations, inequalities, etc.) and contain a variety of mathematical ideas, it also