纵观历届高考数学试题的综合题,大部分属于函数、方程、不等式或函数、数列、不等式型。而其中不等式的证明是高中数学的一个难点,其特点是方法多样而且灵活,技巧性强,使得掌握起来很困难。本文将就构造函数证明不等式作一些简要的探讨,并举例说明。 Throughout the previous college entrance examination math test questions, most of them belong to the function, equation, inequality or function, sequence, inequality type. The proof of inequality is a difficult point in high school math, which is characterized by diverse and flexible methods and skillfulness, making it difficult to master. This article will give a brief discussion of the constructor proved inequalities, and give an example.