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若直线y=x+b与曲线有公共点,则b的取值范围是( ) A.[,] B.[,3]...
若直线y=x+b与曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/0.png)
有公共点,则b的取值范围是( )
A.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/2.png)
]
B.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/3.png)
,3]
C.[-1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/4.png)
]
D.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500409200/SYS201310232119215004092002_ST/5.png)
,3]
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023211921500405450/SYS201310232119215004054006_ST/0.png)
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