含n不等式证明,在高考中屡见不鲜,不等式的证明问题,一直是高考的难点,原因在于考生很难把握放缩的度.如何把握,就需要我们对已知条件及待证式子的结构进行认真分析,在此基础上整体布局.其中,对数据的敏感是调整思路的关键,放缩的方法有很多,下面通过例题来说明.例1 2009年山东高考数学理科卷20题 The inequality with n shows that it is not uncommon for the college entrance examination to prove that inequality proves that it is difficult for candidates to grasp the scale of the college entrance examination.How to grasp it requires that we make the known conditions and the structure of awaiting proof Careful analysis, on the basis of the overall layout.Among them, the sensitivity of the data is the key to adjusting ideas, there are many ways to zoom, the following example to illustrate .Example 1 2009 Shandong entrance mathematics science volume 20 questions