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“末位数字是0或5的整数能被5整除”的 否定形式是 否命题是 .
“末位数字是0或5的整数能被5整除”的
否定形式是
否命题是 .
考点分析:
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若椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372011_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.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372011_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372011_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372011_ST/3.png)
D.
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椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372010_ST/0.png)
上有n个不同的点:P
1,P
2,…,P
n,椭圆的右焦点为F,数列|P
nF|是公差不小于
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372010_ST/1.png)
的等差数列,则n的最大值是( )
A.198
B.199
C.200
D.201
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已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372009_ST/0.png)
(mn≠0)的离心率为2,有一个焦点恰好是抛物线y
2=4x的焦点,则此双曲线的渐近线方程是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372009_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372009_ST/2.png)
C.3x±y=0
D.x±3y=0
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已知圆锥曲线mx
2+4y
2=4m的离心率e为方程2x
2-5x+2=0的两根,则满足条件的圆锥曲线的条数为( )
A.1
B.2
C.3
D.4
查看答案
在同一坐标系中,方程a
2x
2+b
2y
2=1与ax+by
2=0(a>b>0)的曲线大致是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372007_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372007_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102455613937246/SYS201311031024556139372007_ST/images2.png)
D.
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