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设$x,y$都是非负实数,证明$x^x+y^y\geqslant x^y+y^x$

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isee Posted at 2017-9-19 17:09:41 |Read mode
Last edited by isee at 2017-9-19 17:24:00设$x,y$都是非负实数,证明$x^x+y^y\geqslant x^y+y^x$.

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kuing Posted at 2017-9-19 20:31:14
《数学憋间》第 16 期 P21 起

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 Author| isee Posted at 2017-9-20 17:02:55
回复 2# kuing


    我擦,高考题,命这种题。。。。。

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 Author| isee Posted at 2017-9-21 17:09:33
Last edited by isee at 2017-9-21 17:17:00“赏”下书中的高等数学解法:
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