不等式是中学数学和高等数学中最重要的内容之一.而不等式的证明是重中之重,也是难点.不等式证明的常用方法有:构造函数法、比较法、综合法、分析法、反证法、判别式法、放缩法、最值法、增量法、数学归纳法等. Inequality is one of the most important contents of mathematics and advanced mathematics in middle school, while the proof of inequality is the most important and difficult point.Implemented the inequalities commonly used methods are: constructor method, comparative method, comprehensive method, analytic method, contradictory method, Discriminant method, scaling method, the most value method, incremental method, mathematical induction and so on.