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[不等式] 分式不等式

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szl6208 Posted 2013-10-4 18:52 |Read mode
设$a,b,c>0$,证明:
$\sum\frac{4{a^2}+41ab}{b(8a+b)}\geqslant 15$

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其妙 Posted 2013-10-4 22:11
回复 1# szl6208
分子分开的话,前个可证明,后一个似乎不好证明(或不能证明,反向)

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