Forgot password?
 Create new account
View 2602|Reply 2

陕西文科数学压轴题与hadamard不等式

[Copy link]

462

Threads

969

Posts

9934

Credits

Credits
9934

Show all posts

青青子衿 Posted at 2013-11-2 13:47:22 |Read mode
搜狗截图_2013-11-02_13-36-47.jpg
QQ截图20131102150326.gif
出题者可谓是高屋建瓴!

7

Threads

53

Posts

398

Credits

Credits
398

Show all posts

icesheep Posted at 2013-11-2 16:04:43
早前就有一些高中题牵扯到对数均值不等式了,$b > a > 0$
\[\sqrt {ab}  < \frac{{b - a}}{{\ln b - \ln a}} < \frac{{a + b}}{2}\]

462

Threads

969

Posts

9934

Credits

Credits
9934

Show all posts

 Author| 青青子衿 Posted at 2020-10-7 16:32:29
Last edited by 青青子衿 at 2020-10-8 10:39:00裴礼文《数学分析中典型问题与方法》P335~356
朱尧辰《大学生数学竞赛题选解》P103~104
周民强《微积分专题论丛》P19
6092474.png

手机版Mobile version|Leisure Math Forum

2025-4-21 14:12 GMT+8

Powered by Discuz!

× Quick Reply To Top Return to the list