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对于每个实数x,设f(x)取y=4x+1,y=x+2,y=-2x+4三个函数中的...
对于每个实数x,设f(x)取y=4x+1,y=x+2,y=-2x+4三个函数中的最小值,则f(x)的最大值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231034495848774/SYS201311012310344958487010_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231034495848774/SYS201311012310344958487010_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231034495848774/SYS201311012310344958487010_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231034495848774/SYS201311012310344958487010_ST/3.png)
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231034495848774/SYS201311012310344958487006_ST/0.png)
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