解题方法
1 . 已知
,
是椭圆
的左、右焦点,点
是
上一点,
的中点在
轴上,
为坐标原点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/a5e23d32-c4f5-4b67-98da-9041b21f6281.png?resizew=189)
(1)求椭圆
的方程;
(2)过点
任意作两条倾斜角互补的直线交椭圆于B,C两点,设直线BC的斜率为
,证明:
为定值,并求
的值.
![](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/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/a5e23d32-c4f5-4b67-98da-9041b21f6281.png?resizew=189)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
2 . 已知椭圆E的中心是坐标原点O,焦点在y轴上,离心率等于
,F是椭圆E的上焦点,点P在第一象限,点P和点
都在椭圆E上,且
的面积等于
,A、B是椭圆E上异于P的不同的动点,且
.
(1)求椭圆E的方程;
(2)求证:直线
的斜率是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c393440b5ffba0abd4478f946de0b3b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c71c49dc9a9de1a0221769e4eb8616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d5416cca40a5caa71f3336dfe7e57c.png)
(1)求椭圆E的方程;
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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3 . 已知椭圆
的离心率为
,且椭圆C经过点
,过右焦点F的直线l与椭圆C交于A,B两点.
(1)求椭圆C的方程;
(2)设O为坐标原点,求
面积的最大值以及此时直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0471cd3dccabaef113cd5761544d7c.png)
(1)求椭圆C的方程;
(2)设O为坐标原点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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2023-04-09更新
|
1858次组卷
|
10卷引用:山西省部分学校2023届高三下学期4月联考数学试题
山西省部分学校2023届高三下学期4月联考数学试题河南省创新发展联盟2023届高三下学期二模考试数学(理)试题河南省创新发展联盟2023届高三下学期二模考试数学(文)试题辽宁省县级重点高中联合体2023届高三二模数学试题海南省华侨中学2023届高三第四次模拟考试数学试题吉林省白山市2023届高三下学期四模联考(4月期中)数学试题河北省保定市唐县第一中学2022-2023学年高二下学期5月月考数学试题陕西省商洛市洛南中学2022-2023学年高二下学期期中理科数学试题(已下线)高二数学上学期期中考模拟卷(直线与方程+圆与方程+圆锥曲线与方程)-【考点通关】2023-2024学年高二数学高频考点与解题策略(苏教版2019选择性必修第一册)(已下线)专题15 圆锥曲线综合
解题方法
4 . 已知椭圆
的上顶点为
,右焦点为
,点
满足
.
(1)证明:点
在椭圆上;
(2)若直线
与椭圆有两个不同的交点P、Q,O是坐标原点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.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/96a4ddcc6237c80d95ef9e042228a763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd7109381b7ecc83065c37d3e065558.png)
(1)证明:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17875c01cc8bc8c9b7b84d40211a8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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2023-04-06更新
|
480次组卷
|
2卷引用:2023届高三冲刺卷(二)全国卷-理科数学试题
5 . 已知椭圆
:
经过
,
两点,M,N是椭圆
上异于T的两动点,且
,直线AM,AN的斜率均存在.并分别记为
,
.
(1)求证:
为常数;
(2)证明直线MN过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383f12cb70ca55eba4ff012771dbfa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c5ad47223dcd7afbd03a26c7f6bb37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032a2eb83561061db7c31d35a93a328f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
(2)证明直线MN过定点.
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2023-03-30更新
|
925次组卷
|
6卷引用:四川省自贡市2023届高三下学期第二次诊断性考试数学(文)试题
名校
解题方法
6 . 已知椭圆
过点
,且离心率为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆E的标准方程;
(2)若直线l与椭圆E相切,过点
作直线l的垂线,垂足为N,O为坐标原点,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b54b9cf95418bc3dce6e4c698b9907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆E的标准方程;
(2)若直线l与椭圆E相切,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c9dcfd9f4c5298035870cb88a34169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291a0231b8630f8eda4245105ef7c38b.png)
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2023-03-29更新
|
2197次组卷
|
7卷引用:北京市房山区2023届高三一模数学试题
2023·全国·模拟预测
解题方法
7 . 已知椭圆
的离心率
,过点
的直线l与C交于A,B两点,当直线l的斜率不存在时,
.
(1)求C的方程.
(2)试问:
是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269a51e0f77f63bae2df3dc8b1d4f455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
(1)求C的方程.
(2)试问:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea09e77343690c043169fbac9682d433.png)
您最近一年使用:0次
8 . 已知椭圆E:
的一个顶点为
,离心率
.
(1)求椭圆E的方程;
(2)过点
作斜率为k的直线与椭圆E交于不同的两点B,C,直线AB,AC分别与x轴交于点M,N.设椭圆的左顶点为D,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383f12cb70ca55eba4ff012771dbfa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234e7679481ec0d01c915b7fbb71891d.png)
(1)求椭圆E的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580afba2dd40c59442fcab57e4bb7591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca565b6ec6a4d7017e96395b665cea3.png)
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2023-03-27更新
|
1309次组卷
|
3卷引用:北京市东城区2023届高三一模数学试题
名校
解题方法
9 . 已知对称轴都在坐标轴上的椭圆C过点
与点
,过点
的直线l与椭圆C交于P,Q两点,直线
,
分别交直线
于E,F两点.
(1)求椭圆C的标准方程;
(2)
是否存在最小值?若存在,求出最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e0e42ae6e67e4b12ccb82f299ed84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
(1)求椭圆C的标准方程;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d35475555789a8a1a246e600d97a699.png)
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2023-03-24更新
|
541次组卷
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4卷引用:河南省许济洛平2022-2023学年高三第三次质量检测文科数学试题
解题方法
10 . 已知椭圆
过
、
、
、
四个点中的三个点.
(1)求椭圆
的方程;
(2)过点
的直线与椭圆
交于
、
两点,直线
、
分别交椭圆
于
、
两点,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f407e04d6a1cbe7d23cc3196367ff3ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603183fcce97c866c9a82d78bd834e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a17a09085264374029ed691b0876a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bf69ff73500b545bebf091b3990103.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e407197bd73a89cbdd7e220b7f9b77b0.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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