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设函数,其中[x]表示不超过x的最大整数,如[-1.2]=-2,[1.2]=1,...
设函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231010862528617/SYS201311012310108625286006_ST/0.png)
,其中[x]表示不超过x的最大整数,如[-1.2]=-2,[1.2]=1,[1]=1,若f(x)=kx+k(k>0)有三个不同的根,则实数k的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231010862528617/SYS201311012310108625286006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231010862528617/SYS201311012310108625286006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231010862528617/SYS201311012310108625286006_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231010862528617/SYS201311012310108625286006_ST/4.png)
考点分析:
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