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过双曲线的左焦点F(-c,0),(c>0),作圆:x2+y2=的切线,切点为E,...
过双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/0.png)
的左焦点F(-c,0),(c>0),作圆:x
2+y
2=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/1.png)
的切线,切点为E,延长FE交双曲线右支于点P,若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/2.png)
=
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(
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+
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),则双曲线的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/6.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/7.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/8.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069008_ST/9.png)
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069004_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069004_ST/1.png)
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直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069003_ST/0.png)
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A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069003_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069003_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733072206942/SYS201311031007330722069003_ST/3.png)
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