近几年,以教材例题为背景的高考试题常考常新。这类试题本身难度不大,但同学们得分普遍较低。究其原因,主要是大家对教材内容不够熟悉,知识记忆含糊,导致丢分严重。下面通过对课本一道例题的探究,介绍不等式证明的一些常用方法,供同学们学习时参考。 In recent years, the textbook sample as the background of the college entrance examination test often test new. Such questions are not difficult on their own, but their scores are generally lower. The reason is that we are not familiar with the content of the textbook, memory of knowledge fuzzy, leading to serious drop points. The following through an example of the textbook to explore the inequalities to introduce some of the commonly used methods for students to learn reference.