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换元法作为数学中的基本方法,高中生已经非常熟悉.学生通过系统的题型训练,对于一些基本题型,比如换元法求复合函数单调区间、值域的问题,掌握得比较扎实.但对有些函数求值域问题,题中参数较多的时候,还是感觉无所适从.本文旨在对高中生掌握不太理想的题型做个小结,希望让学生通过学习,构建完整的知识体系,形成指导解题的数学思想方法,深化认识,提升思维品质.
As a basic method in mathematics, the students’ changing method is very familiar to senior high school students.Students through the system of the type of training, for some basic questions, such as the metamorphosis complex function monotone interval, the value of the domain to grasp more solid. However, for some function domain problems, the questions in the more parameters, or feel at a loss .This paper aims to master the less than ideal high school students to make a summary of the questions, I hope that students through learning, to build a complete knowledge system, Form a mathematical way of thinking and solving problems, deepen our understanding and improve the quality of thinking.