不等式的证明方法有很多种,其中比较法是一种常用的基本方法,比较法又包括两种方法:作差法和作商法,而在高中数学中,作差比较法应用范围比较广。它可分为几个明确的步骤:1.作差;2.变形;3.定号(判断与零的大小关系)。其中关键的步骤是变形以后所采用的方法,常用的主要有分解因式、配方、通分、分母有理化等,后两者比较容易判断,而变形后究竟是采用分解因式还是配方就需要做出准确的判断。但只要细心总结,就会发现这类题目给出的已知条件其实是有 There are many ways to prove inequalities, of which comparative method is a commonly used basic method, comparative method includes two methods: difference method and business method, while in high school mathematics, difference comparison method has a wide range of applications. It can be divided into several explicit steps: 1. To make poor; 2. Deformation; 3. Fixed number (to determine the size of the relationship between zero). One of the key steps is the method used after deformation, commonly used mainly decomposition factor, formula, pass points, denominator and other physical and chemical, the latter two more easy to judge, and after the deformation is the use of factoring or formula required Make accurate judgments. But as long as careful summary, you will find that the known conditions given by such topics is actually there