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椭圆+=1(a>b>0)的离心率为,若直线y=kx与其一个交点的横坐标为b,则k...
椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572376098/SYS201311031022385723760011_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572376098/SYS201311031022385723760011_ST/1.png)
=1(a>b>0)的离心率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572376098/SYS201311031022385723760011_ST/2.png)
,若直线y=kx与其一个交点的横坐标为b,则k的值为
.
考点分析:
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