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[函数] 函数的含参数问题

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敬畏数学 posted 2017-1-20 19:09 |Read mode
Last edited by 敬畏数学 2017-1-21 20:45.已知函数f(x)=(1+lnx)/(x-1) ,g(x)=k/x,k为正自然数,若对任意的c>1 ,存在实数a,b 满足0<a<b<c,使得f(c)=f(a)=g(b),则k的最大值()

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original poster 敬畏数学 posted 2017-1-21 17:20
回复 1# 敬畏数学

???

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realnumber posted 2017-1-21 19:21
是不是检查下题目,说的都是f(x),与k没有关系啊....

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original poster 敬畏数学 posted 2017-1-21 20:45
回复 3# realnumber
题错误。已经改。

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realnumber posted 2017-1-21 21:37
几何画板试了下,猜k=3.
如图,证明你应该自己可以完成的.
QQ截图20170121213506a.png
QQ截图20170121213534b.png

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其妙 posted 2017-2-25 23:41
see here(要往下看):blog.sina.com.cn/s/blog_54df069f0102veuu.html

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original poster 敬畏数学 posted 2017-2-27 08:52
回复 6# 其妙
大牛!很好。多多参与。

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