不等式的证明是高中数学中的一个重要内容,方法多、思路灵活、技巧性强.教材中介绍了比较法、分析法和综合法等常规证法.但对于许多结构新颖、风格各异的不等式,运用常规方法往往难以奏效,或者证明过程十分繁琐,有必要另辟蹊径,以发挥求异思维的探索功能.函数是贯穿于高中数学课程的一条主线,它是高考与竞赛试题的主要内容,而利用函数在处理不等式问题上往往大有用武之地.笔者根据教学中的体会,结合实例从几个方面来简要谈谈 The proof of inequality is an important content in high school mathematics, with many methods, flexible ideas and strong technical skills, and introduces common law methods such as comparative method, analytic method and comprehensive method, etc. However, for many structures with different structures and different styles, , The use of conventional methods are often difficult to work or prove that the process is very cumbersome, there is a need to find ways to explore the function of different thinking.Function is a main line throughout the high school mathematics curriculum, which is the main content of college entrance examination and competition questions, Function in dealing with the problem of inequality often useful.I according to teaching experience, combined with examples from several aspects to briefly talk