1 . 如图,圆
与
轴切于点
,与
轴正半轴交于
两点.点
在点
的下方,且
.
![](https://img.xkw.com/dksih/QBM/2020/5/2/2453956687749120/2454864123715584/STEM/bed54e9d2ce04d7eb21e1f61b3116f08.png?resizew=218)
(1)求圆
的方程;
(2)过点
作一条直线与椭圆
相交于
两点,连接
,求证:
.
![](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/3b45d68e7ef26c34a15988283610c95c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7490886e2807c7b8a4fa57d99c4dc3a.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/03f4840c22eb33c7e7115ff911a96be6.png)
![](https://img.xkw.com/dksih/QBM/2020/5/2/2453956687749120/2454864123715584/STEM/bed54e9d2ce04d7eb21e1f61b3116f08.png?resizew=218)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb398137779190b35492d9f06d5fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35acbc816706f5349e123e12eb25ea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5ce23462dfd28929430b74b9590940.png)
您最近一年使用:0次
名校
2 . 已知椭圆
的焦距为2,左右焦点分别为
,以原点
为圆心,以椭圆
的短半轴长为半径的圆与直线
相切.
(1)求椭圆
的方程;
(2)设不过原点的直线
与椭圆C交于
两点,若直线
与
的斜率分别为
,且
,求证:直线
过定点,并求出该定点的坐标;
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5d58c8c55fc8dac4fcdf3221300316.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设不过原点的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3656055f5256cd06e636ea96e9f89c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d200a411fbc2f50ad72f1fd729a7d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2019-09-13更新
|
1746次组卷
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6卷引用:湖北省荆州市石首市第一中学2019-2020学年高三上学期8月月考理科数学试题
3 . 已知椭圆
的下焦点为
,
与短轴的两个端点构成正三角形,以
(坐标原点)为圆心,
长为半径的圆与直线
相切.
(1)求椭圆
的方程;
(2)设点
为直线
上任意一点,过点
作与直线
垂直的直线
,
交椭圆
于
两点,
的中点为
,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281c9349efe55d0db7395761fe9dc08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e0f7f6d4b14813f18aa16caca7dbd9.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3481ecc58fb0c27daf08f7735c48d8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea52bf7f8fd9b8c250482db53bdf0705.png)
您最近一年使用:0次
2019-05-23更新
|
413次组卷
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2卷引用:【市级联考】湖北省黄冈市2019届高三2月联考数学(文)试题
4 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5563df225901b03c51b139684de04bd1.png)
的离心率为
,短轴长为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2eaa371f-e998-4332-81bb-58991ace1bfb.png?resizew=219)
(1)求椭圆
的方程;
(2)已知直线
与
轴交于点
,过点
的直线
与
交于
、
两点,点
为直线
上任意一点,设直线
与直线
交于点
,记
,
,
的斜率分别为
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5563df225901b03c51b139684de04bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2eaa371f-e998-4332-81bb-58991ace1bfb.png?resizew=219)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1e9cdd5a82f29ec89b2c53b4fa6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4602fefda18bd0764dfb40e60e36acd3.png)
您最近一年使用:0次
2019-05-05更新
|
726次组卷
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3卷引用:【省级联考】湖北省2019届高三4月份调研考试数学(文)试题
名校
5 . 如图,已知椭圆
焦距为2,F为椭圆C的右焦点,A(-a,0),![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bf568503d7b4906d1066dd61048693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/286c1e46-6e62-43fb-9dba-9af57d08184f.png?resizew=172)
(1)求椭圆C的方程;
(2)设O为原点,P为椭圆C上一点,AP的中点为M,直线OM与直线
交于点D,过O且平行于AP的直线与直线
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b475cfce3dc46b2632bc1d171c980489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bf568503d7b4906d1066dd61048693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/286c1e46-6e62-43fb-9dba-9af57d08184f.png?resizew=172)
(1)求椭圆C的方程;
(2)设O为原点,P为椭圆C上一点,AP的中点为M,直线OM与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5672ebf6960bbf8b171582e1a7dd0ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dda41b6dee37e043fac54bfda5d9da.png)
您最近一年使用:0次
6 . 已知椭圆C:
的长轴长为4,点
在椭圆C上.
(1)求椭圆
的方程;
(2)设点
,过点
的直线
交椭圆
于
两点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e43c3621b12e03422ae9868c78e3327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f534ae0f48e3b3080243698da06f6f73.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfdfc1132c82d2bebf248e3839295120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074bf58a8c0f4f48e016dff4ea310d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef463e9b1ecc2123f08e4c1d83c7b3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c44cb987feda45e18b1d83898dcd62b.png)
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7 . 已知椭圆
的左右焦点分别为
,其焦距为
,点
在椭圆
上,
,直线
的斜率为
(
为半焦距)·
(1)求椭圆
的方程;
(2)设圆
的切线
交椭圆
于
两点(
为坐标原点),求证:
;
(3)在(2)的条件下,求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5379ca02a94af1e74e5e00e38ba6e327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a649229b6afa314d5cb7d9a66115734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f4faed99e8f7100584d50eedea8c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ecc3aaae2aa289591a3b632f1e0645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b33328faae2d2d4921900e97424de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b2fe2eaadae4df6247a131a1cddb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff24c95fe581befd56c3bcc70e88b726.png)
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2019-03-26更新
|
453次组卷
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3卷引用:【市级联考】湖北省八市(黄石市.仙桃市.天门市.潜江市.随州市.鄂州市.咸宁市.黄冈市)2019届高三3月联合考试理科数学试题
8 . 已知椭圆
的离心率为
,右焦点为
,且该椭圆过点
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)当动直线
与椭圆
相切于点
,且与直线
相交于点
,求证:
为直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54acb1cc9bc2c4065796da0ad467b0ac.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)当动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/150193befc6ea4a027990c5cf216351e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5666c09fdd41cf808379debef9d3a8.png)
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2019-01-31更新
|
301次组卷
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2卷引用:【市级联考】湖北省仙桃、天门、潜江市2019届高三上学期期末考试数学(理)试题
名校
解题方法
9 . 已知
为椭圆
上三个不同的点,
为坐标原点,且
为
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed0d66e8-16a2-4cbb-9ec2-8e615745044b.png?resizew=199)
(1)如果直线
、
的斜率都存在,求证:
为定值;
(2)试判断
的面积是否为定值,如果是就求出这个定值,否则请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff1455a4045eb93f482c0751840aea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed0d66e8-16a2-4cbb-9ec2-8e615745044b.png?resizew=199)
(1)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70368971462ca516a9a9b03fbaa8e81.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2018-08-15更新
|
638次组卷
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4卷引用:湖北省部分重点中学2018-2019学年度上学期新高三开学考试数学(理科)试题
湖北省部分重点中学2018-2019学年度上学期新高三开学考试数学(理科)试题四川省成都市龙泉驿区第一中学校2019届高三上学期入学考试数学(理)试题【全国百强校】山东省枣庄第八中学2019届高三12月月考数学(理)试题(已下线)考点53 圆锥曲线的综合问题-定点、定值和探索性问题(考点专练)-备战2021年新高考数学一轮复习考点微专题
名校
10 . 已知点
和椭圆
.
(1)设椭圆的两个焦点分别为
,
,试求
的周长及椭圆的离心率;
(2)若直线
与椭圆
交于两个不同的点
,直线
与
轴分别交于
两点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61651b2c7782343781523c2b80ce5be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f6e3c42e3da933bf1a0e4b42233c06.png)
(1)设椭圆的两个焦点分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6758b8b074d33ea9e82818593656e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7155284dd936a234de37b151850503d7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4602a035ffcba25c0f40f723536f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1567d8f98fabc1a3948f8602cc5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adaf2a29ffe39a22be97d9ee4c0a09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e3727b7bbd795b05332fbf9649e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36631fe9e7ac2ad233a065b928b98dc.png)
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2卷引用:湖北省长阳县第一高级中学2017-2018学年高二下学期期末考试数学(文)试题