已知椭圆
、抛物线
的焦点均在
轴上,
的中心和
的顶点均为原点
,从每条曲线上取两个点,
将其坐标记录于下表中:
(Ⅰ)求
,
的标准方程;
(Ⅱ)请问是否存在直线
满足条件:①过
的焦点
;②与
交于不同两点
,
,且满足
?
若存在,求出直线
的方程;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/aa41542b2706458d9505eae30c206cb6.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/d73dfda1236c41759f68490c0aff8219.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/61da92e53d524fef935e125f422a62a9.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/aa41542b2706458d9505eae30c206cb6.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/d73dfda1236c41759f68490c0aff8219.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/c1b9f987345247e3a07f2c3133bc8b4a.png)
将其坐标记录于下表中:
x | 3 | ![]() | 4 | ![]() |
![]() | ![]() | 0 | ![]() | ![]() |
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/aa41542b2706458d9505eae30c206cb6.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/d73dfda1236c41759f68490c0aff8219.png)
(Ⅱ)请问是否存在直线
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/afbcb3ca569846069869e8a0f20bb497.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/d73dfda1236c41759f68490c0aff8219.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/6dc4896a9ab848d1852abe7de86537ef.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/aa41542b2706458d9505eae30c206cb6.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/20cd3c85125140d6997887112af1a366.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/c5401bc8bb574fd5a1ad120191abc8c2.png)
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/750cbc53f9cc4cc9b12c187d12e85409.png)
若存在,求出直线
![](https://img.xkw.com/dksih/QBM/2015/7/9/1572173908058112/1572173914177536/STEM/afbcb3ca569846069869e8a0f20bb497.png)
2012·吉林长春·一模 查看更多[2]
更新时间:2015-07-09 15:28:12
|
【知识点】 椭圆
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】设椭圆
过点
,
两点,O为坐标原点.
(1)求椭圆E的标准方程;
(2)是否存在圆心为原点的圆,使得该圆的任意一条切线与椭圆E恒有两个交点A,B,且
?若存在,写出该圆的方程,并求
的取值范围,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cac72ae550626c8583e4466b8b33d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9638c84128a7f93c2633c39d3a63b4.png)
(1)求椭圆E的标准方程;
(2)是否存在圆心为原点的圆,使得该圆的任意一条切线与椭圆E恒有两个交点A,B,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfe4da6f357e55927d25d9d27ea8717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐2】已知椭圆
,离心率
.直线
与
轴交于点
,与椭圆
相交于
两点.自点
分别向直线
作垂线,垂足分别为
.
(Ⅰ)求椭圆
的方程及焦点坐标;
(Ⅱ)记
,
,
的面积分别为
,
,
,试证明
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069ffc1e3936d254303d588e1a70a3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234e7679481ec0d01c915b7fbb71891d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51698f7095e795d4f0527b986ac1db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4c9a27635035cd982ad546e4675ae6.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b9329a9ac91c0904b0c0dab7444d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbd232ceb4f9d0ef81f4a94e603abcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9690f3ace672b3de492cfebb2c7b8096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9c8bd2a8d905ee3aa7ab6bcd3ec55f.png)
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