二次函数在闭区间上的最值问题是高中函数学习中的难点,适当分类将有助于学生掌握这章节的知识,本文从直观的角度,将这类问题分成了不含参数、闭区间含参数和二次函数含参数三个部分,并对每类进行了详细的解答和分析,总结题目的规律,旨在帮助学生更好的掌握这章的内容。 The most significant problem of quadratic function in the closed interval is the difficulty in high school function learning. Appropriate classification will help students to master the knowledge of this chapter. In this paper, from the visual point of view, this problem is divided into no parameters, closed interval Containing parameters and quadratic functions with parameters of three parts, and each class was a detailed answer and analysis, summarizes the rules of the topic, designed to help students better grasp of this chapter’s content.