已知椭圆
经过点
,其左焦点
的坐标为
.过
的直线交椭圆于A,B两点.
(1)求椭圆的方程;
(2)当线段AB的中点的横坐标为
时,求直线AB的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e454c7161999e2a67138869f59d319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa98b3f5fa18d38292170956357e0754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
(1)求椭圆的方程;
(2)当线段AB的中点的横坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535e95d241e9c978c10355dcb07da256.png)
更新时间:2020-12-11 22:27:59
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【推荐1】设
分别是椭圆
:
的左,右两个焦点,
上的点
到
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(1)求
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(2)若直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】求适合下列条件的椭圆的标准方程:
(1)长轴长为4,短轴长为2,焦点在y轴上;
(2)经过点
,
;
(3)一个焦点为
,一个顶点为
;
(4)一个焦点为
,长轴长为4;
(5)一个焦点为
,离心率为
;
(6)一个焦点到长轴的两个端点的距离分别为6,2.
(1)长轴长为4,短轴长为2,焦点在y轴上;
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af9c5931ec7880e5c2706fd449a7d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c044362183e52c9f684765b8a77fba0.png)
(3)一个焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0a7f9ee3c6ccaea8dd3d5ad042e5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa2e31608e60e3fd40c040cfe9d6e8e.png)
(4)一个焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b900119ed6ab5f17f145c63f5d21117a.png)
(5)一个焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539111d30cf81c8d7e5529fd7b7afced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(6)一个焦点到长轴的两个端点的距离分别为6,2.
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【推荐1】已知椭圆E:
(
)的离心率为
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(1)求椭圆E的方程;
(2)若直线l:
被椭圆E所截得的线段为AB,求线段AB的中点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
(1)求椭圆E的方程;
(2)若直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07225849d13e453ce2efbac7d5cfc0b1.png)
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【推荐2】已知椭圆
:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cc83edb24c6f10815aaf52b59bb097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/4b38cb725d4f1ccbab80369ecc2d2f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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