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[不等式] 某不等式

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琉璃幻 posted 2013-7-6 05:14 |Read mode
对a,b,c∈R+,有∑sqrt(a+b)≥∑sqrt((ab+3b^2)/(a+b))

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original poster 琉璃幻 posted 2013-7-14 13:27
艹,居然沉!

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其妙 posted 2013-7-14 15:33
回复 2# 琉璃幻
显示效果不好。是这样的吗?
对$a$,$b$,$c∈R_+$,有$∑\sqrt{a+b}\geqslant∑\sqrt{\dfrac{ab+3b^2}{a+b}}$

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