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已知点M是直线l:2x-y-4=0与x轴的交点,过M点作直线l的垂线,得到的直线...
已知点M是直线l:2x-y-4=0与x轴的交点,过M点作直线l的垂线,得到的直线方程是 .
考点分析:
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2,则它的体积为
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已知椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720339267700/SYS201311031027203392677009_ST/0.png)
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=1(a>b>0)的左、右焦点为F
1,F
2,P为椭圆上的一点,且|PF
1||PF
2|的最大值的取值范围是[2c
2,3c
2],其中c=
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.则椭圆的离心率的取值范围为( )
A.[
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B.[
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,1)
C.[
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M(x
,y
)为圆x
2+y
2=a
2(a>0)内异于圆心的一点,则直线x
x+y
y=a
2与该圆的位置关系为( )
A.相切
B.相交
C.相离
D.相切或相交
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已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102720339267700/SYS201311031027203392677007_ST/0.png)
-
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=1的右焦点为(3,0),则该双曲线的离心率等于( )
A.
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B.
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C.
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D.
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已知点A(2,3),B(-3,-2).若直线l过点P(1,1)且与线段AB相交,则直线l的斜率k的取值范围是( )
A.
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B.
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C.k≥2或
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D.k≤2
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