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[函数] 漂移题吗?

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敬畏数学 Posted 2019-9-23 08:36 |Read mode
$ f(x)=x-\frac{1}{2}sinx-\frac{m}{2}lnx+1$,存在$s,t∈(0,+\infty ),s≠t,$ 满足$f(s)=f(t)$, 证明:$ st<m^2 $

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facebooker Posted 2019-9-23 11:37
Last edited by facebooker 2019-9-23 13:09回复 1# 敬畏数学

是的 标准的漂移题 ALG带入就行了 但是需要先考察$g(x)=x-\sin x$的单调性 把$\sin x$放缩掉

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kuing Posted 2019-9-23 12:34
forum.php?mod=viewthread&tid=6564(没解答,只是想对比一下代码与效果……

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吕玉波 Posted 2019-9-29 07:46
sinx用x换了  飘移吧   最近武汉的题目吧

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 Author| 敬畏数学 Posted 2019-9-29 09:36
回复 2# facebooker

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 Author| 敬畏数学 Posted 2019-9-29 09:37
[b]回复 4# 吕玉波 [
  

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