已知P(0,2)是椭圆
的一个顶点,C的离心率
.
(1)求椭圆的方程;
(2)过点P的两条直线l1,l2分别与C相交于不同于点P的A,B两点,若l1与l2的斜率之和为-4,则直线AB是否经过定点?若是,求出定点坐标;若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4294843dc627c5063a09ab944b5dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4682ac3b48cbb6d54716f6e1a8bff.png)
(1)求椭圆的方程;
(2)过点P的两条直线l1,l2分别与C相交于不同于点P的A,B两点,若l1与l2的斜率之和为-4,则直线AB是否经过定点?若是,求出定点坐标;若不过定点,请说明理由.
2019·广东汕尾·一模 查看更多[2]
更新时间:2019-03-27 23:16:07
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相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的左、右焦点分别为
、
,点
在椭圆上,且椭圆的离心率为
.
(1)求椭圆的标准方程;
(2)直线
过椭圆左焦点
,与椭圆交于
,
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.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/dea8a480a2fe03293cb8303da8837d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆的标准方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becdcb8a871e8965853acf0687034c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
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【推荐2】如图,
为坐标原点,椭圆
的左、右焦点分别为
、
,离心率为
;双曲线
的左、右焦点分别为
、
,离心率为
,已知
, 且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f945afe463ab6afb499e7dcd1d4dd16.png)
过
作
的不垂直于
轴的弦
,
为
的中点,直线
与
交于
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/0686572b-6773-4e4a-a4ab-9d1008bebbfc.png?resizew=205)
(1)求
、
的方程;
(2)若四边形
为平行四边形,求直线
的方程;
(3)求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e48d1edbfb6a5a48f9a95551d1dbc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e749c051ebeba72d9873b4f31c8ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f945afe463ab6afb499e7dcd1d4dd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/0686572b-6773-4e4a-a4ab-9d1008bebbfc.png?resizew=205)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff0f5c1f2848aa7bf1de0aeb7e5096b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31809ce2093b2f7cd9b11a89d882c34.png)
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解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知椭圆
两焦点
,并经过点
.
(1)求椭圆
的标准方程;
(2)设
为椭圆
上关于
轴对称的不同两点,
为
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,证明:直线
的交点
仍在椭圆
上;
(3)你能否将(2)推广到一般椭圆中?写出你的结论即可.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b46051fea24610b42da314ec58bbb80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142eefc20e0a5ab44d56d38ca442ae16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)你能否将(2)推广到一般椭圆中?写出你的结论即可.
您最近一年使用:0次
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解题方法
【推荐2】已知焦点在
轴上椭圆的长轴的端点分别为
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,
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为右焦点,且
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.
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