已知两定点
,点
在椭圆
上,且满足
,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e104802a0f0b0b38146219fa65626c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914075a4574c09bdb860d8f8f09a4e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0ecf8049d69be4f8c15a8f35bffcf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc86613c8ad7fb3c3984870bf33cfe43.png)
更新时间:2019-03-02 15:55:13
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名校
【推荐1】若将方程
化简为
的形式,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38cfacb377d5b320df5ecd63b6fa6a9.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7c1861f63ee4bf5d33004b8a1f0988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38cfacb377d5b320df5ecd63b6fa6a9.png)
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【推荐2】在直角坐标平面
内,已知点
,
.设
为该平面上的一个动点,若
,则点
的轨迹方程为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e0324df8c7c6b865114839199a6c1c.png)
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解题方法
【推荐3】在
中,
,
,
,以A,B为公共焦点的椭圆
和双曲线
都经过点C,则
与
的离心率之和为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2964fea2c107bbfd4a07fc97f4de5988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657921f28d9ebc92f154ac16d3599b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3a7e3355ee508b11f19c15e28dfeab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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解题方法
【推荐1】已知双曲线C:
(
,
)的左、右焦点分别为
,
,离心率为
.若过点
的直线与C交于A,B两点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529c3c75331bcb0561196dffc6141cd1.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ab02a01fa41c784b688575fe90539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74110bc818c2f5a53d63451c5251eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436a2732e9c9d5ce401c448cd9de80e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82fe25db889399bb3ca4ffd5dd5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d572ecf27dc02fcbd588f24647b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82fe25db889399bb3ca4ffd5dd5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5fb3eb91e50d77c094e44d974ef86b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529c3c75331bcb0561196dffc6141cd1.png)
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