已知椭圆
和双曲线
有公共焦点
,
,
为这两条曲线的一个交点,则
的值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49358e49ae68a92444b5e732a79b28b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5c23d287ebbfffcd37ceb08adc2288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75436dfba3658f87e4c7830e508a752f.png)
A.![]() | B.![]() | C.3 | D.![]() |
更新时间:2019-11-27 16:42:54
|
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【推荐1】一动圆
与圆
外切,而与圆
内切,那么动圆的圆心
的轨迹是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3bb3154d6b2cecdfe27e03d7a16eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d90337837f7a9b65599ccf4a5111dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.椭圆 | B.双曲线 | C.椭圆或双曲线一支 | D.抛物线 |
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【推荐2】已知
,
是椭圆
的两个焦点,椭圆
上的两点
,
满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69daca955a565fa537347dd0d93783f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f2bddf58e4593f6a5fe2dbca1e3219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f79d52ceddd919a8b40f637ae2a02a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f6befb71426a36608250822da095ceb.png)
A.![]() | B.![]() |
C.3 | D.2 |
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【推荐1】双曲线
:
的左右焦点分别为
,
,一条渐近线方程为
,若点
在双曲线
上,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b0a5f6d439f73bade7dafc70b24988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc261508f42e75323971f0b8282b0ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27ad0481b4eba360acafcc03919d4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5ecc35b2ad878d62f4c4210023de15.png)
A.7 | B.9 | C.1或9 | D.3或7 |
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【推荐2】过双曲线
的左焦点
作圆
的切线,切点为
,延长
交双曲线右支于点
,
为坐标原点,若
为
的中点,则双曲线的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29a410aac7c18ed31fdf8dc9be9d7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b51671068cb81aced85a649d5f1bc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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