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若直线kx-y-4k=0与曲线有公共的点,则实数k的取值范围( ) A. B. ...
若直线kx-y-4k=0与曲线
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有公共的点,则实数k的取值范围( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100540324250987/SYS201311031005403242509006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100540324250987/SYS201311031005403242509006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100540324250987/SYS201311031005403242509006_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100540324250987/SYS201311031005403242509006_ST/4.png)
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