对于不等式恒成立问题,这类问题题型多变,解答有一定难度,重点考查不等式与函数、数列、导数、几何等知识的交汇应用,知识面广,对数学思想方法要求高。很多同学在解决这类问题时往往无所适从。下面结合例题介绍几种思维方式,供参考。一、构造函数 For the problem of inequality constant establishment, this type of problem varies, and the solution has a certain degree of difficulty. It focuses on examining the convergence of inequalities and functions, series, derivatives, geometry and other knowledge. It has a wide range of knowledge and requires a high degree of mathematical thinking. Many students are often at a loss when it comes to solving such problems. The following examples introduce several ways of thinking for reference. First, the constructor