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已知F1,F2是椭圆的两个焦点,过F1且与椭圆长轴垂直的直线交椭圆于A,B两点,...
已知F
1,F
2是椭圆的两个焦点,过F
1且与椭圆长轴垂直的直线交椭圆于A,B两点,若△ABF
2是正三角形,则这个椭圆的离心率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182646104358062/SYS201310241826461043580006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182646104358062/SYS201310241826461043580006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182646104358062/SYS201310241826461043580006_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182646104358062/SYS201310241826461043580006_ST/3.png)
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