已知焦点在x轴上的椭圆C,长轴是短轴的3倍,且经过点
,过点
的直线l交椭圆C于A,B两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/cdaabff4-5f84-4fc3-8825-eb100b512044.png?resizew=165)
(1)求椭圆C的标准方程;
(2)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776aba3c4a76094fd32886964fbb37f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0a7f9ee3c6ccaea8dd3d5ad042e5f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/cdaabff4-5f84-4fc3-8825-eb100b512044.png?resizew=165)
(1)求椭圆C的标准方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
更新时间:2021-03-12 23:17:07
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知椭圆
过点
,离心率为
.
![](https://img.xkw.com/dksih/QBM/2022/1/22/2899774921129984/2909124976984064/STEM/12edb5da-9f0e-4a27-82d9-6bee0b2e1ae9.png?resizew=150)
(1)求椭圆的标准方程;
(2)过椭圆的上顶点作直线l交抛物线
于A,B两点,O为坐标原点.
①求证:
;
②设OA,OB分别与椭圆相交于C,D两点,过点O作直线CD的垂线OH,垂足为H,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4ca616e225686a236f7c2db3e16dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb7c44fbd558182e05b1f82e4c337c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2022/1/22/2899774921129984/2909124976984064/STEM/12edb5da-9f0e-4a27-82d9-6bee0b2e1ae9.png?resizew=150)
(1)求椭圆的标准方程;
(2)过椭圆的上顶点作直线l交抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
②设OA,OB分别与椭圆相交于C,D两点,过点O作直线CD的垂线OH,垂足为H,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33a489fa920ff269b00784034def90a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】已知椭圆
的右焦点为F,短轴长等于焦距,且经过点
.
(1)求椭圆E的方程;
(2)设过点F且不与坐标轴垂直的直线与E交于A,B两点,线段AB的中点为C,D是y轴上一点,且
,求证:线段CD的中点在x轴上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1b6f209d1a805437046ca6ef79dd.png)
(1)求椭圆E的方程;
(2)设过点F且不与坐标轴垂直的直线与E交于A,B两点,线段AB的中点为C,D是y轴上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知椭圆
的离心率为
,椭圆
上一点
到它的左、右焦点
的距离之和为4,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb991a1e599582230c1583da3702798.png)
(1)求椭圆
的方程;
(2)过点
的直线
交椭圆
于
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.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/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb991a1e599582230c1583da3702798.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff8a5886e42095da57422c8777c10d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在平面直角坐标系
中,椭圆
过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/1ed0acaa-01c3-4f3c-bf11-5fa322b5a9ee.png?resizew=146)
(1)求椭圆C的标准方程;
(2)点A为椭圆C的左顶点,过点A的直线与椭圆C交于x轴上方一点B,以AB为边作平行四边形ABCD,其中直线CD过原点
,求平行四边形ABCD面积S的最大值;
(3)在(2)的条件下,是否存在如下的平行四边形ABCD:“原点
到直线AB的距离与线段AB的长度相等”,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c158a44f6c0b9e9ced78328cb94f7785.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/1ed0acaa-01c3-4f3c-bf11-5fa322b5a9ee.png?resizew=146)
(1)求椭圆C的标准方程;
(2)点A为椭圆C的左顶点,过点A的直线与椭圆C交于x轴上方一点B,以AB为边作平行四边形ABCD,其中直线CD过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(3)在(2)的条件下,是否存在如下的平行四边形ABCD:“原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次