函数是高中数学的核心概念,也是历年高考考查的重点和热点,其性质众多且复杂,时常让人感到难以把握,尤其是对于一些条件或结构相似的函数问题,若不认真审题,仔细对比,则往往会产生思维上的误区,本文结合实例辨析八组“形似质异”的函数问题,供大家参考.1.定义域与值域定义域与值域犹如一对孪生兄弟,一脉相承,相辅相成.一方面,自变量在定义域中的变化导致因变量在值域中的变化;另一方面,定义 Function is the core concept of high school mathematics, but also the focus and hotspot of college entrance examination over the years, its nature is numerous and complex, often make people feel difficult to grasp, especially for some conditions or structure similar to the function of the problem, It often leads to myths of thinking, this article combines eight examples of “functionally similar to the quality of the problem,” for your reference.1 domain and value domain definition domain and range as a pair of twin brothers, the same strain, On the one hand, the change of the independent variable in the domain leads to the change of the dependent variable in the range; on the other hand, the definition