Discuz Math Forum»Forum › Mathematics › High School › 不等式证明

Return to list New

View 2030|Reply 3

[不等式] 不等式证明

[Copy link]

186 Threads	206 Posts	0 Reputation

Send PM

guanmo1 posted 2014-12-26 11:00 |Read mode

如图，

Reply Edit 0

186 Threads	206 Posts	0 Reputation

Send PM

original poster guanmo1 posted 2014-12-26 11:26

知道了，放缩为xi的倒数和，用n元均值，得到＞n^2, 注意到n≥2即可。

Reply Edit

673 Threads	110K Posts	218 Reputation

Send PM

kuing posted 2014-12-26 13:31

这也太水了，仅仅前两项和就已经 $\ge 16/3=5.333...$

Reply Edit

186 Threads	206 Posts	0 Reputation

Send PM

original poster guanmo1 posted 2014-12-26 16:15

回复 3# kuing

是水，所以……

Reply Edit

Return to list New

Quick Reply

× Quick Reply To Top Edit

2025-7-15 14:57 GMT+8

Powered by Discuz!

Processed in 0.014514 seconds, 25 queries