论文部分内容阅读
1一道高考题蕴含的思想方法2008年高考江苏卷的19题的第(2)小题是:求证对于一个给定的正整数n(n≥4),存在一个各项及公差都不为零的等差数列,b1,b2,…bn,其中任意三项(按原来顺序)都不能组成等比数列.
1 a college entrance examination contains the ideas and methods 2008 college entrance examination in Jiangsu volume of 19 questions (2) is a small problem: proof for a given positive integer n (n ≥ 4), there is a non-zero and all the items are not zero Of equal difference sequence, b1, b2, ... bn, any three of them (in the original order) can not form a geometric sequence.