如果一个数列
的任意相邻三项
、
、
满足
,则称该数列为“对数性凸数列”.设正项数列
是对数性凸数列.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668d1dcf486145a68016aab72dc6a4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b8d5b6045219ea4527202ab131bb2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ceafd269653186523ea78921a0b2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4809bbf1b45fe9160d5c2ee6787ad32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca2b0946db9bbcbce5f19507f5c485e.png)
2009高三·湖南·竞赛 查看更多[1]
(已下线)2009年全国高中数学联赛湖南省预赛试题
更新时间:2018-12-24 18:37:17
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