直线y=2x与直线x+y=3的交点坐标是 .
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若直线y=kx+1与直线2x+y-4=0垂直,则k=
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设m,n∈R,若直线(m+1)x+(n+1)y-2=0与圆(x-1)
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2=1相切,则m+n的取值范围是( )
A.[1-
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,1+
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]
B.(-∞,1-
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]∪[1+
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,+∞)
C.[2-2
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,2+2
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]
D.(-∞,2-2
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]∪[2+2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212975621/SYS201310251237212129756011_ST/7.png)
,+∞)
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直线y=kx+3与圆(x-3)
2+(y-2)
2=4相交于M,N两点,若
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,则k的取值范围是( )
A.[-
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,0]
B.
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C.[-
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]
D.[-
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,0]
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