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已知双曲线(a>0,b>0)的右焦点为F,过点F作一条渐近线的垂线,垂足为A,△...
已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101422211118172/SYS201311031014222111181008_ST/0.png)
(a>0,b>0)的右焦点为F,过点F作一条渐近线的垂线,垂足为A,△OAF的面积为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101422211118172/SYS201311031014222111181008_ST/1.png)
(O为原点),则此双曲线的离心率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101422211118172/SYS201311031014222111181008_ST/2.png)
B.2
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101422211118172/SYS201311031014222111181008_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101422211118172/SYS201311031014222111181008_ST/4.png)
考点分析:
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