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已知过点A(-2,m)和B(m,4)的直线与直线2x+y-1=0平行,则m的值为...
已知过点A(-2,m)和B(m,4)的直线与直线2x+y-1=0平行,则m的值为( )
A.0
B.-8
C.2
D.10
考点分析:
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双曲线
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的渐近线方程是( )
A.
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B.
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C.
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D.
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过抛物线y=ax
2(a>0)的焦点F作一直线交抛物线于P、Q两点,若线段PF与FQ的长分别是p、q,则
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+
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等于( )
A.2a
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222906682159883/SYS201311012229066821598024_ST/2.png)
C.4a
D.
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若椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222906682159883/SYS201311012229066821598023_ST/0.png)
的左、右焦点分别为F
1、F
2,线段F
1F
2被抛物线y
2=2bx的焦点分成5:3两段,则此椭圆的离心率为( )
A.
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B.
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C.
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D.
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椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222906682159883/SYS201311012229066821598022_ST/0.png)
上有n个不同的点P
1,P
2,P
3,…,P
n,椭圆的右焦点F,数列{|P
nF|}是公差大于
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的等差数列,则n的最大值为( )
A.198
B.199
C.200
D.201
查看答案
F
1,F
2是双曲线的两个焦点,Q是双曲线上任一点,从焦点F
1引∠F
1QF
2的平分线的垂线,垂足为P,则点P的轨迹为.
A.直线
B.圆
C.椭圆
D.双曲线
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