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[不等式] 三元带根号不等式

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天书 posted 2013-6-15 15:55 |Read mode
$a,b,c\ge 0,a+b+c=3$证明$$\sum{\sqrt{a^2+bc+2}}\ge 6$$

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魔幻水果 posted 2013-6-15 21:17
楼主,你的求和符号没有上下角标

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kuing posted 2013-6-15 21:21
轮换求和是行规

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pxchg1200 posted 2013-6-15 22:10
回复 3# kuing


    算了半天,不会。。

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pxchg1200 posted 2013-6-22 13:46
Let's solution say the method!

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kuing posted 2013-6-22 14:15
回复 5# pxchg1200

居然要 Muirhead ……

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其妙 posted 2013-6-22 17:58
回复 5# pxchg1200
牛笔!

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