解题方法
1 . 已知椭圆
的左、右焦点分别为
,左顶点为
,离心率为
,经过
的直线交椭圆于
两点,
的周长为8.
(1)求椭圆
的方程;
(2)过直线
上一点
作椭圆
的两条切线,切点分别为
,求
的最大值.
说明:若点
在椭圆
上,则椭圆
在点
处的切线方程为
.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8376a8a3dd42eaa0558501a3e2a2bdb4.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39b4ab8209e56bf6ece460b90c3f1b9.png)
说明:若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9656735f55e5de465e5667ba578d4e.png)
您最近一年使用:0次
2 . 已知椭圆
的离心率为
,以C的短轴为直径的圆与直线
相切.
(1)求C的方程;
(2)直线
:
与C相交于A,B两点,过C上的点P作x轴的平行线交线段AB于点Q,直线OP的斜率为
(O为坐标原点),△APQ的面积为
.
的面积为
,若
,判断
是否为定值?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8591c458c5675e87f9f9f8ac2b710ea9.png)
(1)求C的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e98e989c0f10700ea51b2c6a8efc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e08d5c04f0431fb57b33a01717b599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0832f7f02ec077d4a0061bc5f67c6722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612367da04a206b8b4369985c367e8f2.png)
您最近一年使用:0次
2023-03-14更新
|
3930次组卷
|
5卷引用:四川省成都市简阳市阳安中学2023届高考适应性考试数学(理科)试题
名校
解题方法
3 . 已知椭圆
的离心率为
,其左、右焦点分别为
,上顶点为
,且
的面积为
.
(1)求椭圆
的方程;
(2)直线
与椭圆
交于
两点,
为坐标原点.试求当
为何值时,使得
恒为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a11a6557746896f12fbeaa4540ee45.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a0d9a2f14f7e789892487d6585804a.png)
您最近一年使用:0次
2023-03-10更新
|
429次组卷
|
5卷引用:四川省绵阳市实验高级中学2022-2023学年高二下学期第一次检测文科数学试题
名校
解题方法
4 . 已知椭圆
的离心率为
是
的左、右焦点,
是
的上顶点,且
.
(1)求椭圆
的方程;
(2)
是椭圆
的右顶点,斜率为
的直线
与
交于
两点(
与
不重合).设直线
的斜率为
,直线
的斜率为
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a6eb41112e758cca611ded89889a46.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451d082593fd202a3265ce70223d2bb9.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d56d3e52a8b5f332ab049fe12b936da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
您最近一年使用:0次
2023-03-07更新
|
808次组卷
|
7卷引用:四川省成都外国语学校2023-2024学年高三上学期入学考试数学(理科)试卷
名校
解题方法
5 . 已知椭圆
的长轴长为
,且过点
.
(1)求C的方程和离心率;
(2)过点
与作直线l交椭圆C于点D、E(不与点A重合).
是否为定值?若是,求出该定值,若不是,求其取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
(1)求C的方程和离心率;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a9e0691a845ad6100074b5c06946fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
您最近一年使用:0次
2023-03-07更新
|
647次组卷
|
2卷引用:四川省泸州市龙马高中2022-2023学年高二下学期第一次月考数学(文)试题
名校
解题方法
6 . 已知椭圆
的离心率为
,且过点
.
(1)求椭圆C的方程;
(2)若直线
为椭圆C在点P处的切线,
,且直线
与椭圆C交于A,B两点.
(ⅰ)求直线
的方程;
(ⅱ)当
的面积取最大值时,求直线
的方程.
![](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/1f13bf66fc845b115de4ec45b4be0e23.png)
(1)求椭圆C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176877187312e07c3a04c73718fa39a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次
名校
解题方法
7 . 定义椭圆C:
上的点
的“圆化点”为
.已知椭圆C的离心率为
,“圆化点”D在圆
上.
(1)求椭圆C的方程;
(2)设椭圆C的左顶点为A,不过点A的直线l交椭圆C于M,N两点,点M,N的“圆化点”分别为点P,Q.记直线l,AP,AQ的斜率分别为k,
,
,若
,则直线l是否过定点?若直线l过定点,求定点的坐标;若直线l不过定点,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe115831e7a4a0cccfa3b4bd2e9943f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d0066d806e2fadbe68c1405afb0e80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
(1)求椭圆C的方程;
(2)设椭圆C的左顶点为A,不过点A的直线l交椭圆C于M,N两点,点M,N的“圆化点”分别为点P,Q.记直线l,AP,AQ的斜率分别为k,
![](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/ed06be37684e5999b3378a09c7706b48.png)
您最近一年使用:0次
2023-03-02更新
|
785次组卷
|
4卷引用:四川省成都市玉林中学2023-2024学年高二上学期期末模拟数学试题(一)
名校
解题方法
8 . 已知椭圆
的离心率为
,焦距为4.
(1)求椭圆
的方程;
(2)设过椭圆的右焦点
的动直线
与椭圆交于
、
两点(点
在
轴上方),
、
为椭圆的左、右顶点,直线
,
与
轴分别交于点
、
,
为坐标原点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设过椭圆的右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec18c028746b73be7503ff6ff458a8c.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27b957de1bf137d15eb6321b4e58f1a.png)
您最近一年使用:0次
2023-02-26更新
|
563次组卷
|
4卷引用:四川省宜宾市南溪第一中学校2024届高三上学期一诊考试理科数学模拟试题
四川省宜宾市南溪第一中学校2024届高三上学期一诊考试理科数学模拟试题江西省上饶市2023届高三第一次高考模拟考试数学(理)试题(已下线)江西省上饶市2023届高三第一次高考模拟考试数学(理)试题变式题16-20(已下线)专题16解析几何(解答题)
名校
解题方法
9 . 已知椭圆E:
的离心率为
,且过点
.
(1)求椭圆E的方程;
(2)若直线m过椭圆E的右焦点和上顶点,直线l过点
且与直线m平行.设直线l与椭圆E交于A,B两点,求AB的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26454b354884f8b9d63910d5dc72e1cc.png)
(1)求椭圆E的方程;
(2)若直线m过椭圆E的右焦点和上顶点,直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d23fc512ad69a2d5919ce690407704.png)
您最近一年使用:0次
2023-02-24更新
|
1518次组卷
|
7卷引用:四川省内江市第六中学2022-2023学年高二下学期第一次月考数学(文科)试题
四川省内江市第六中学2022-2023学年高二下学期第一次月考数学(文科)试题黑龙江省哈尔滨市第九中学校2022-2023学年高三下学期开学测试数学试卷内蒙古通辽市科尔沁左翼中旗实验高级中学2023届高三下学期第三次模拟考试数学(理)试题河南省焦作市博爱县第一中学2022-2023学年高二下学期4月月考数学试题(已下线)模块一 专题2 《解析几何》单元检测篇 A基础卷(已下线)第04讲 拓展一:直线与椭圆的位置关系-【练透核心考点】2023-2024学年高二数学上学期重点题型方法与技巧(人教A版2019选择性必修第一册)(已下线)题型22 5类圆锥曲线解题技巧
10 . 已知椭圆
的右焦点为F,离心率为
,且点
在椭圆上.
(1)求椭圆C的标准方程;
(2)过右焦点F且斜率不为0的直线l与椭圆C交于A,B两点,线段AB的中点为Q,经过坐标原点O和点Q的直线m与椭圆C交于M,N两点,求四边形AMBN的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
(1)求椭圆C的标准方程;
(2)过右焦点F且斜率不为0的直线l与椭圆C交于A,B两点,线段AB的中点为Q,经过坐标原点O和点Q的直线m与椭圆C交于M,N两点,求四边形AMBN的面积的取值范围.
您最近一年使用:0次
2023-02-23更新
|
589次组卷
|
3卷引用:四川省成都玉林中学2023届高三下学期二诊考试理科数学模拟试题