如图,已知
是椭圆C:
左右焦点,过
的直线
与椭圆C交于A,B两点,且
的周长为8.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/15ae7cda-28bf-48ac-ad95-6b7ecb465669.png?resizew=172)
(1)求椭圆C的方程;
(2)若椭圆C的长轴是DE,直线AD,BE的斜率分别是k1,k2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0069e73aa8522bd8853e2945b277b534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/15ae7cda-28bf-48ac-ad95-6b7ecb465669.png?resizew=172)
(1)求椭圆C的方程;
(2)若椭圆C的长轴是DE,直线AD,BE的斜率分别是k1,k2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
更新时间:2023-11-11 09:41:28
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21006280c08a3a761d9ccb9af7369b9f.png)
(1)过椭圆右焦点作垂直于
轴的直线AB,交椭圆于A,B两点,F1是椭圆的左焦点,求三角形AF1B的周长;
(2)已知点P是椭圆
上一点,且以点P及焦点
为顶点的三角形的面积等于1,求点P坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21006280c08a3a761d9ccb9af7369b9f.png)
(1)过椭圆右焦点作垂直于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知点P是椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21006280c08a3a761d9ccb9af7369b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.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】已知椭圆
的左、右焦点分别为
,
,离心率为
,点M在椭圆C上移动,
的周长为
.
(1)求椭圆C的方程;
(2)若A,B分别是椭圆C的左、右顶点,O为坐标原点,点P为直线
上的动点,连接AP交椭圆于点Q(异于点A).判断
是否为定值,若是,求出该定值;若否,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42fc33bcfc63ec2f4940ccd3f862400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.png)
(1)求椭圆C的方程;
(2)若A,B分别是椭圆C的左、右顶点,O为坐标原点,点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36438445b136e00f442957a689e9289a.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
是椭圆
的左、右焦点,点
是
的上顶点,且直线
的斜率为
.
(1)求椭圆
的方程;
(2)过点
作直线
,若
与
交于两点
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f49644cd9fa4688cc3a74a234952530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.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/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/05da40a2d7dab5d6a003906ca19d4749.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2】已知椭圆
过点
,其右焦点为
.
(1)求椭圆
的方程;
(2)设
为椭圆
上一动点(不在
轴上),
为
中点,过原点
作
的平行线,与直线
交于点
. 问:直线
与
斜率的乘积是否为定值?若为定值,求出该值;若不为定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca22d434c8671cf39eba5fa03b31ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】设椭圆
的左、右焦点分别为
,上顶点为
,离心率为
, 在
轴负半轴上有一点
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4906a320688910f95850b782a2be2339.png)
![](https://img.xkw.com/dksih/QBM/2013/4/17/1571187501981696/1571187507707904/STEM/cbe0b25e10b74b91801f0e3f3f261e31.png?resizew=180)
(1)若过
三点的圆 恰好与直线
相切,求椭圆C的方程;
(2)在(1)的条件下,过右焦点
作斜率为
的直线
与椭圆C交于
两点,在
轴上是否存在点
,使得以
为邻边的平行四边形是菱形,如果存在,求出
的取值范围;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1fc56c646dd5485fcc3e59ddb5b56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4906a320688910f95850b782a2be2339.png)
![](https://img.xkw.com/dksih/QBM/2013/4/17/1571187501981696/1571187507707904/STEM/cbe0b25e10b74b91801f0e3f3f261e31.png?resizew=180)
(1)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a506e8f36e7e5fd80d164a73f51f70c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d202fa5d5c7abf2020374eabb93de5.png)
(2)在(1)的条件下,过右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d903b1ff09e933b73ef0f75fc861dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec8858389f4c3156a946ba8bf0d8a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
【推荐2】已知椭圆具有如下光学性质:从椭圆的一个焦点发出的光线射向椭圆上任一点,经椭圆反射后必经过另一个焦点.若从椭圆
的左焦点
发出的光线,经过两次反射之后回到点
,光线经过的路程为8,T的离心率为
.
(1)求椭圆T的标准方程;
(2)设
,且
,过点D的直线l与椭圆T交于不同的两点M,N,
是T的右焦点,且
与
互补,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004d3c8fff0581f4651ce992ef080de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆T的标准方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d209a493826a4416a2e839b3b79549cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a59d2738345079ced7cc9ce2120f588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e85d6725758e31a8f52a731625d12b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6aa459fb005aec948ca209e898c354f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
您最近一年使用:0次