在给出函数的定义域、值域或其变化范围的情况下,求解与之相关的某些参数的取值范围的一类函数问题,被称之为函数的定义域、值域的逆向问题.众所周知,函数的定义域、值域的求解没有通性解法,只能依据函数解析式的结构特征来灵活解决,而函数的逆向问题还要反其道而行之,可想而之 In the case of a given function’s domain, value range, or its range of variation, a type of function problem that solves the range of values ​​for some of its associated parameters is called the function’s domain, the domain’s inverse problem. As we all know, the definition of the function domain, the solution of the value domain has no universal solution, can only be solved flexibly according to the structural features of the function analytical formula, and the inverse problem of the function must be the other way, can be thought of