求适合下列条件的椭圆的标准方程.
(1)椭圆的两个焦点坐标分别为
,
,椭圆上一点P到两焦点的距离之和等于10;
(2)椭圆的焦点在x轴上,且经过点
和点
.
(3)椭圆的离心率为
,一个焦点为
.
(1)椭圆的两个焦点坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d83c160f7a34b4d54a3662903f1691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fc36d022a685f5e973f282882186df.png)
(2)椭圆的焦点在x轴上,且经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf20cf8a2912b42998a7cd163f870d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d5f1676dc00e9b0af4656ce047170.png)
(3)椭圆的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cddc1fa3a1ecf1b79f63d94a96ffb669.png)
更新时间:2023-12-20 13:57:26
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【推荐1】已知椭圆
的左焦点为
,右焦点为
,焦距
为
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于
两点,且
的周长为
.
(1)求椭圆
的方程;
(2)若直线
的斜率为
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
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【推荐2】已知椭圆
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(1)试求椭圆
的标准方程;
(2)
分别是椭圆长轴的左右两个端点,
是椭圆上与
均不重合的相异两点,设直线
的斜率分别是
.若直线
过点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c84b524087cf2d47ba827365f0a87c7.png)
(1)试求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d42cb68c5c877a455ba7ac0a6b6a651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
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【推荐1】已知椭圆的中心在原点,焦点在
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交椭圆于
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两点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbe1d3ac7a55fb321ef492c266649e3.png)
(1)求椭圆的标准方程;
(2)倾斜角为45°的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/3f4dfec890cdfdda355e19463f3be813.png)
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【推荐2】已知椭圆:
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(2)过椭圆
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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