如图,在
中,已知
,
,
.则过点
且以
、
为两焦点的双曲线的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60bf54181eaafbd1990f2e16263863a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d467d38e20ef01cbbae0cec54903a28b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f749ecfb170f0d5b98b1a342c3cf2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2018/12/4/2089511285030912/2090144209625088/STEM/4fbcdb3701034bdeb412d5d3ff876f21.png?resizew=153)
2014高三·辽宁·竞赛 查看更多[1]
(已下线)2014年全国高中数学联赛辽宁赛区预赛试题
更新时间:2018-12-05 11:12:11
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【知识点】 圆锥曲线
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较难
(0.4)
【推荐1】如图,
分别为双曲线
的左、右焦点,P为双曲线右支上一点(除去右顶点),
与
的边
相切,与边
的延长线也都相切.当点P在双曲线的右支上运动时,圆心A的轨迹方程为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197c241d356926f79708a700e3629b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586a09b882af6e6e29e1db2850c99078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e7468d344942e1062aa2fb638a44f3.png)
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较难
(0.4)
【推荐2】设椭圆
的两焦点与短轴一端点组成一个正三角形三顶点.若焦点到椭圆上的点的最短距离为
,则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffa2cf31088fabbab6c8e091ee4548f.png)
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