名校
解题方法
1 . 已知椭圆
的左,右焦点分别为
,
,过
的直线交椭圆于
,
两点.
(1)若直线
与椭圆的长轴垂直,
,求椭圆的离心率;
(2)若直线
的斜率为1,
,求椭圆的短轴与长轴的比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00c5d8c6ee5963849f382dabb2a163f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58754ade23ab857673e9871b1027c427.png)
您最近一年使用:0次
2018-04-26更新
|
519次组卷
|
2卷引用:2018年普通高等学校招生全国统一考试模拟试题(衡水金卷调研卷)文数三
名校
2 . 已知焦点在
轴上的椭圆
的一个焦点在直线
上,则椭圆的离心率为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a06085f9151eec2d0b608cf6171ae5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492853cc04480a3503c49fdd48389953.png)
您最近一年使用:0次
2018-04-26更新
|
801次组卷
|
2卷引用:【衡水金卷】2018年普通高等学校招生全国统一考试高三调研卷模拟二文科数学试题
名校
3 . 已知点
为椭圆
:
上一点,
是椭圆
的两个焦点,如
的内切圆的直径为3,则此椭圆的离心率为
![](https://img.xkw.com/dksih/QBM/2018/4/18/1926565310963712/1928747278286848/STEM/09febbe4993645e891174b61aee35078.png?resizew=191)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7056cf6399c9a93f408cc234d06e59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](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/0a9df1061c3ba5151ba2f7359acaf356.png)
![](https://img.xkw.com/dksih/QBM/2018/4/18/1926565310963712/1928747278286848/STEM/09febbe4993645e891174b61aee35078.png?resizew=191)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-04-21更新
|
7528次组卷
|
3卷引用:河北省衡水金卷2018年高三调研卷 全国卷 I A 理科数学试题(二)
名校
4 . 椭圆
的离心率为
,且过点
.
(1)求椭圆
的方程;
(2)设
为椭圆
上任一点,
为其右焦点,点
满足
.
①证明:
为定值;
②设直线
与椭圆
有两个不同的交点
,与
轴交于点
.若
成等差数列,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd5f27c5f8a8cda3403c73108dfd30c.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46732ec9eb4402ac209ab73ab5f9087.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225c00cb44cc4242acc317948ea92a28.png)
②设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80e3a3b6c6513a45506f605638f5655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876ee472609dfbb3fff945445da18c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2018-04-11更新
|
470次组卷
|
3卷引用:河北省保定市2018届高三第一次模拟考试数学(文)试题
名校
解题方法
5 . 已知椭圆
:
的离心率为
,直线
交椭圆
于
、
两点,椭圆
的右顶点为
,且满足
.
(1)求椭圆
的方程;
(2)若直线
与椭圆
交于不同两点
、
,且定点
满足
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b9ee9176ccf3d4c3ac67d80af71d50.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9663faaf515e09c2f3e2e6de30768e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/69f57faedc199cba55a1537db20a0cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ea90017ca31f48e35b20f5d188e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2018-04-11更新
|
1427次组卷
|
10卷引用:河北省衡水中学2018届高三数学(理科)三轮复习系列七-出神入化4
河北省衡水中学2018届高三数学(理科)三轮复习系列七-出神入化4四川省2018届高三“联测促改”活动数学(文科)试题【全国省级联考】四川省2018届高三联测促改文数试题【全国百强校】宁夏石嘴山市第三中学2018届高三下学期第四次模拟考试数学(文)试题甘肃省武威第六中学2020届高三下学期第二次诊断考试数学(文)试题陕西省西安市2020届高三高考数学(理科)第三次质检试卷题陕西省西安市2020届高三高考数学(文科)第三次质检试题江西省红色七校(分宜中学、会昌中学等)2021届高三第二次联考数学(文)试题宁夏中卫市2022届高三第三次模拟考试数学(理)试题新疆乌鲁木齐市第八中学2021-2022学年高二下学期期末考试数学(文)试题
名校
解题方法
6 . 设点
是椭圆
上的点,以点
为圆心的圆与
轴相切于椭圆的焦点
,圆
与
轴相交于不同的两点
,若
为锐角三角形,则椭圆的离心率的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1f167ece5d18225840af97b39af9e4.png)
您最近一年使用:0次
2018-05-30更新
|
2411次组卷
|
8卷引用:河北省衡水中学2017届高三高考押题2卷理数试题
7 . 已知点
在以坐标原点为中心,坐标轴为对称轴,离心率为
的椭圆上.若过点
作长轴的垂线恰好过椭圆的一个焦点
,与椭圆的另一交点为
.若
的面积为12(
为椭圆的另一焦点),则椭圆的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b769cf23a440d0832c87b9b900774f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2018-01-27更新
|
388次组卷
|
2卷引用:河北省沧州市普通高中高三上学期教学质量监测(联考)数学(文)试题
解题方法
8 . 已知椭圆
的中心在原点,焦点在
轴上,焦距为
,离心率为
.
(1)求椭圆
的方程;
(2)设直线
经过点
,且与椭圆
交于
两点,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b661c79b7b866204fd4084c37bdd4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2018-01-25更新
|
747次组卷
|
8卷引用:河北省衡水市武邑中学2018届高三上学期第五次调研考试数学(文)试题
名校
9 . 设椭圆
的两个焦点是
,过
的直线与椭圆
交于
,若
,且
,则椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582beccec08defce6e8b9a3ac5b7e519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2264cf51361f6630ea1d4ab5bed222.png)
您最近一年使用:0次
2018-04-27更新
|
832次组卷
|
6卷引用:河北省衡水中学2018届高三上学期七调考试数学(理)试题
河北省衡水中学2018届高三上学期七调考试数学(理)试题湖北省部分重点中学2017-2018学年度上学期期中联考高二数学(文科)试题重庆市江津中学校2018届高三4月月考数学(理)试题安徽省六安市舒城中学2019-2020学年高二下学期期末文科数学试题(已下线)专题2.3 椭圆(B卷提升篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教B版)(已下线)专题22 圆锥曲线的离心率问题-1
名校
解题方法
10 . 已知椭圆
的左焦点为
轴上的点
在椭圆外,且线段
与椭圆
交于点
,若
,则
椭圆的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865e9cac45e0017f8b69d3de635f20c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2044ce197d5064eb0f19960323204d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-01-11更新
|
1772次组卷
|
3卷引用:河北省衡水中学2018届高三上学期九模考试数学(文)试题