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[不等式] z:一个不等式

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realnumber posted 2014-6-4 16:39 |Read mode
上海李--
QQ图片20140604163840.jpg

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天书 posted 2014-6-10 20:31
是错的,取$x_1\to2,x_2\to0$其余的为1得到系数$\left(\frac{n}{n-1}\right)^n$应该改为4并且4最佳

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kuing posted 2014-6-10 20:38
是错的,取$x_1\to2,x_2\to0$其余的为1得到系数$\left(\frac{n}{n-1}\right)^n$应该改为4并且4最佳 ...
天书 发表于 2014-6-10 20:31
两边都无穷大怎么判断的……

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其妙 posted 2014-6-10 21:10
回复 2# 天书
这个手抄版,还抄的蛮公整的嘛,结果是错的嗦?

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青青子衿 posted 2014-6-28 13:43
回复 3# kuing
blog.sina.com.cn/s/blog_4c11310201015ged.html
题目系数改为4后就是
2012以色列数学奥林匹克

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