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[不等式] 血狼王强势回归之不等式(1)

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血狼王 posted 2019-6-9 23:02 |Read mode
若有$x\in [0,1],r\in [1,\infty],$ 求证
$$x-x^r\leq 1-\frac{\ln r}{r}$$

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original poster 血狼王 posted 2019-6-9 23:17
这道题拿去做高考压轴题正合适

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kuing posted 2019-6-10 01:36
回复 2# 血狼王

你确定高中生能撸?

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original poster 血狼王 posted 2019-6-10 03:36
回复 3# kuing

因为本人有一个内容不超过高中所学的证明

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original poster 血狼王 posted 2019-6-10 04:50
回复  kuing

因为本人有一个内容不超过高中所学的证明
血狼王 发表于 2019-6-10 03:36
错了,不是【本人】,是【本狼】

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original poster 血狼王 posted 2019-6-10 12:01
仅供参考(我反复看过了,确实没有超过高中数学的内容)

artofproblemsolving.com/community/c390681h137 … _proof_of_i_get_it62
(Grotex是我在那边的id)

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kuing posted 2019-6-10 12:29
回复 6# 血狼王

好吧……

不过这有点难想,放高考题的话大概需要在前面加些小问来提示才行……

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isee posted 2019-6-10 12:33
我什么有直接把r改成e的冲动
PS:题是漂亮的,我只看形式咯(外行话)

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original poster 血狼王 posted 2019-6-10 13:24
回复 7# kuing

是的,其实压轴题大多是设多个小问,所以我说可以放在高考用

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original poster 血狼王 posted 2019-6-10 14:07
我还会有第二个、第三个……反正很多个的

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