已知椭圆
的离心率
,且经过点
.
(1)求C的方程;
(2)直线
交椭圆C于P,Q两点,点P,E关于原点对称,若直线ME与MQ的斜率分别为
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b85acb5a868b0ff2a17b1ca926dd43.png)
(1)求C的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ff33c080c560fccd8d9bf3b08a2886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37ca2bbaa102db55f920aa0bc5ad0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d92fc9cbc71d623104bae063133dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bffbcbb953bc85c121c31c0b56401e.png)
更新时间:2022-07-03 08:41:47
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】知椭圆E:
的左右焦点分别为
,
,过
且斜率为
的直线与椭圆的一个交点在x轴上的射影恰好为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6597a64cfa219358a2a910841346085.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/851ec3fa-6bac-447e-a5b7-aca9483757fd.png?resizew=199)
(1)求椭圆E的方程;
(2)如图,下顶点为A,过点
作一条与y轴不重合的直线.该直线交椭圆E于C,D两点.直线AD,AC分别交x轴于点H,
求证:
与
的面积之积为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9d55173f26afdf0e37462b556a605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d6f746c2355072d914591bf60c3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821309f088a175c00dc0f4828334503d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6597a64cfa219358a2a910841346085.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/851ec3fa-6bac-447e-a5b7-aca9483757fd.png?resizew=199)
(1)求椭圆E的方程;
(2)如图,下顶点为A,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcf82d01c39fd2c96e1edba0ad37dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca0af163f4d59eb4125eb28dccc5ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b632aefa05bf70136d375c7995fec2.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】在平面直角坐标系
中,已知椭圆
与椭圆
,且椭圆
过椭圆
的焦点.过点
的直线l与椭圆
交于A,B两点,与椭圆
交于C,D两点.
(1)求椭圆
的标准方程;
(2)若存在斜率不为0的直线l,使得
,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2486f6f0c37ffc30cf7f45fcdaf09623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7956018da8a5d497474123179e70cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d466e7019fc215699264d18069b87c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若存在斜率不为0的直线l,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f62d8393c3fd719f850a588c81daebe.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知椭圆
,其焦点为
,
,离心率为
,若点
满足
.
(1)求椭圆
的方程;
(2)若直线
与椭圆
交于
两点,
为坐标原点,
的重心
满足:
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](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/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7401bce743d857c2f89f49dfe434769f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a85b64ff0767fc8569421bda2cfe42.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9186c64243690716dfeb6621fa7c35.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/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298e365efe9236f6b97bd4c1ce28d795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】已知椭圆C:
的离心率与双曲线
的离心率互为倒数,且过点
.
(1)求椭圆C的方程;
(2)过
作两条直线
与圆
相切且分别交椭圆于
两点.求证:直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67435325f8812372bfd3ae55e34cda9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a44342c2ee26a279265225982499b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cc7112f172f8800b53f4f96e108013.png)
(1)求椭圆C的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6978fd056f5af0f208471e8ca075a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f7ad7d0c338ee61f425ff404c369c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
【推荐1】已知椭圆
=1上有两点P(﹣2,1)及Q(2,﹣1),直线l:y=kx+b与椭圆交于A、B两点,与线段PQ交于点C(异于P、Q).
(1)当k=1且
时,求直线l的方程;
(2)当k=2时,求四边形PAQB面积的取值范围;
(3)记直线PA、PB、QA、QB的斜率依次为k1、k2、k3、k4.当b≠0且线段AB的中点M在直线y=﹣x上时,计算k1⋅k2的值,并证明:k12+k22>2k3k4.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c03c6b8d7418edf20f474389971352.png)
(1)当k=1且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72313ccba4d3c4329372e40f0d076bff.png)
(2)当k=2时,求四边形PAQB面积的取值范围;
(3)记直线PA、PB、QA、QB的斜率依次为k1、k2、k3、k4.当b≠0且线段AB的中点M在直线y=﹣x上时,计算k1⋅k2的值,并证明:k12+k22>2k3k4.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知椭圆
上有一个顶点到两个焦点之间的距离分别为
,
.
(1)求椭圆的方程;
(2)如果直线
与椭圆相交于
,若
,证明直线
与直线
的交点
必在一条确定的双曲线上;
(3)过点
作直线
(与
轴不垂直)与椭圆交于
两点,与
轴交于点
,若
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755d7e08b98c26303f2f61de7e7ddd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1b1ce092493086f74481b7d6dd9434.png)
(1)求椭圆的方程;
(2)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f00b49dc372cc663cc8b221face0e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1438eef029f29fb708c5b6801996e0ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdebfa07f9b53d79d119cd3a1048e78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f8067c6a7eeb1379df925f6ea88083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2512eec97d3acf5d10bdd0d41f9ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
您最近一年使用:0次