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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Nov 2007 22:37:14 IST
Accepted Answer [?]
![[Up]](/templates/default/images/icon_up.gif "[Up]")
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Using AM, GM inequality,
( ab + xy) / 2 > rt( abxy) . .....(1)
( ax + by) / 2 > rt ( abxy) .......(2)
multiply (1) and (2)
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this reply: 7 points
(with 1 
in 2 votes ) [?]
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