2022高三·全国·专题练习
解题方法
1 . 已知椭圆
,
分别为椭圆左右焦点,过
作两条互相平行的弦,分别与椭圆交于
四点,若当两条弦垂直于
轴时,点
所形成的平行四边形面积最大,则椭圆离心率的取值范围为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ce7e7444b9477c27ece6519169d30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41642d57804007a6d7e980783d157f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41642d57804007a6d7e980783d157f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8035ff4a45af9535e540f7beb358a886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8035ff4a45af9535e540f7beb358a886.png)
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解题方法
2 . 斜率为
的直线与椭圆
交于
两点,点
是椭圆上的一点,且满足
,点
分别是
的重心,点
是
的外心.记直线
的斜率分别为
,若
,则椭圆
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e89cf53f33a239867d760e5faaf7e9d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12d517502935b84640f98d92c3fa3fe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
3 . 已知椭圆
的下顶点为
,右焦点为
,直线AF交椭圆
于
点,
,若
,则椭圆
的离心率的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf82f3643e5ae674e16456be583f0c24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8ac2c2a1a78be9498dc1212f19be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2023-04-21更新
|
848次组卷
|
3卷引用:陕西省西安市铁一中学2024届高三上学期期末数学(理)试题
解题方法
4 . 已知椭圆
的右焦点为
,点
,
在椭圆
上,
为坐标原点,且
,
,则椭圆的离心率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f30d2e534040089f836cfaff68d0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51517f6e2322b35a2f3aa20ede496c8.png)
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解题方法
5 . 已知
为椭圆
上一点,
分别为其左右焦点,
为其右顶点,
为坐标原点,点
到直线
的距离为
,点
到
轴的距离为
,若
,且
成等比数列,则椭圆
的离心率为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef3156dcc7031c963ba097d9c131d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 . 椭圆
的左,右焦点分别是
,
,椭圆
上存在一点
,满足
,
,则椭圆
的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c446fbaa58245b19add0bb81977f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5076829e649b3f3866d4a7e07a5713e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c20fca284394bf5d5b9e5f6d952e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e457eb8c28f5ab11a879c954e15ee87e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d0ca11f053900df652b3acd69fbf8d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
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2023-02-07更新
|
834次组卷
|
3卷引用:四川省宜宾市叙州区第一中学校2023-2024学年高二上学期期末数学试题
名校
7 . 设
、
分别为椭圆
的左、右焦点,椭圆上存在点M,
,
,使得离心率
,则e取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280d2a6b2a0d45904635f528319fc635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f1ea4a7412e643e4b47263e434f2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24131c13ca240e596705ab250bae5139.png)
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解题方法
8 . 已知
,
是椭圆C的两个焦点,若C上存在一点P满足
,则C的离心率的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb79c9f4a2a33392eefea7b20144e2.png)
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9 . 已知
,
,是椭圆
(
)的左,右焦点,P为椭圆上一点,
为等腰三角形,
,则C的离心率为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d72bbe8e3153ec9b618f1c14c5cec6d.png)
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2023-12-11更新
|
761次组卷
|
2卷引用:上海市进才中学2023-2024学年高二上学期1月期末考试数学试题
解题方法
10 . 已知椭圆
:
的左、右焦点为
,
,上顶点为P,直线
交
于点Q,若
,则椭圆
的离心率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
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