已知斜率为2的直线经过椭圆
的右焦点
,与椭圆
相交于
两点.
(1)求与椭圆
有相同的焦点的等轴双曲线
的标准方程.
(2)求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b02deb19ae6db1ae51803de1139a8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求与椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
更新时间:2022-01-17 23:25:25
|
相似题推荐
解答题
|
适中
(0.65)
解题方法
【推荐1】已知双曲线的中心在原点,对称轴为坐标轴,一条渐近线方程为
,右焦点
,双曲线的实轴为
,
为双曲线上一点(不同于
,
),直线
,
分别与直线
交于
,
两点.
(1)求双曲线的方程.
(2)证明
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ac1756e6cc3266bd7198a024f871af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e76582bf1db6ee97233eb508ca37b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc48974114e23f5a801843710c7ae21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5abb0ff04d2135ceeadc98a850ad38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求双曲线的方程.
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238469e628fb2c454f176be31552cd0c.png)
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【推荐2】已知双曲线的中心在原点,且它的一个焦点为
,直线
与其相交于
、
两点,线段
中点的横坐标为
,求此双曲线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4adb8cdd0c182aaa53ef7a63a97d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459c84c9addfbd1cdd0a877ba7c584e4.png)
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名校
解题方法
【推荐1】已知椭圆
的左焦点
到圆
上一点距离的最大值为6,且过椭圆右焦点
与上顶点的直线与圆
相切.
(1)求椭圆
的方程;
(2)若直线
与椭圆
交于A,
两点,当以
为直径的圆与
轴相切时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5076829e649b3f3866d4a7e07a5713e4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c20fca284394bf5d5b9e5f6d952e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe659fb4ca96554eeefd6a305ea1a70d.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01d7e7f0c9d22ae7edaeec1ee6bdfc6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知椭圆
,点M在线段
上,且
,直线
的斜率为
.
(1)求椭圆E的离心率;
(2)若直线l与椭圆E交于C,D两点,弦
的中点为
,且
,求椭圆E的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ed780817998fa52536738cef55f501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1be45533eaf815eb4b5ffdcb377accf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(1)求椭圆E的离心率;
(2)若直线l与椭圆E交于C,D两点,弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879a4007beef22e009248112d664f7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93814e1e0e09064af307c3127166848.png)
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