已知椭圆
的右焦点为F(
,0),且点M(-
,
)在椭圆上.
(1)求椭圆的方程;
(2)直线l过点F,且与椭圆交于A,B两点,过原点O作l的垂线,垂足为P,若
,求λ的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆的方程;
(2)直线l过点F,且与椭圆交于A,B两点,过原点O作l的垂线,垂足为P,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d55bc9fb919baf1283c141db78520d5.png)
21-22高二上·天津·期末 查看更多[4]
更新时间:2022-03-31 23:57:30
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【推荐1】已知椭圆
的中心在原点,焦点在
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(1)求椭圆
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(2)若点P在椭圆上,∠F2PF1=60°,求△PF1F2的面积.
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点P在椭圆上,∠F2PF1=60°,求△PF1F2的面积.
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【推荐2】已知椭圆与双曲线
的焦点相同,且它们的离心率之和等于
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(1)求椭圆方程;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a44342c2ee26a279265225982499b71.png)
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(1)求椭圆方程;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d25e70d37af93796965efc8d342185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解题方法
【推荐1】已知椭圆C:
的离心率为
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(1)求椭圆C的方程;
(2)设O为坐标原点,F为椭圆C的右焦点,过F的直线l与C交于A,B两点,点M的坐标为
.求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆C的方程;
(2)设O为坐标原点,F为椭圆C的右焦点,过F的直线l与C交于A,B两点,点M的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57610afd116ab84660c807cc1aa3819.png)
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【推荐2】设椭圆与两坐标轴的交点分别为
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,点
为坐标原点,点
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,
所在直线的斜率为
.
(1)试求椭圆的离心率
;
(2)设点
的坐标为
,
为线段
的中点,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
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(1)试求椭圆的离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3120582c4f0b7a6f55a5f95cab654a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479d987bc7abd828c64f9dc745836ab.png)
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