高中函数的值域问题是数学学习的重点和难点,而多元函数的值域问题更是成为众多选拔考试容易出现且具有较强区分度的一类题目,一般认为多元函数即目标函数中存在多个变量,这类函数的值域问题的求解方法较为灵活,很多学生在学习过程中感觉难度很大,笔者就求解多元函数的值域提供一些方法. The range problem of high school function is the focus and difficulty of mathematics learning, and the range problem of multivariate function becomes a kind of problem that many selective exams are easy to appear and has strong discrimination. It is generally considered that the multivariate function exists in the objective function A variable, the solution of the range of such functions is more flexible, many students feel very difficult in the learning process, the author to solve the range of multiple functions to provide some methods.