已知椭圆
的离心率为
,过点
的直线
与椭圆
交于
两点,当
过坐标原点
时,
.
(1)求椭圆
的方程;
(2)线段
上是否存在定点
,使得直线
与直线
的斜率之积为定值. 若存在, 求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d363758a1cc53a47db20561e40638692.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
更新时间:2024-05-27 12:48:04
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】已知椭圆
的离心率为
,其左焦点到点
的距离为
.
(1)求椭圆的方程;
(2)直线
与椭圆相交于
两点,求
的面积关于
的函数关系式,并求面积最大时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f46b1729ca4629a96df86ad76b1e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
(1)求椭圆的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fc8a906542ad6dd127ec38c4365c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知椭圆C的方程为
,其离心率为
,
,
为椭圆的左右焦点,过
作一条不平行于坐标轴的直线交椭圆于A,B两点,
的周长为8
(2)过B作x轴的垂线交椭圆于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e7170bb4a2ddcef39391a06c989162.png)
①试讨论直线AD是否恒过定点,若是,求出定点坐标;若不是,请说明理由.
②求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
(2)过B作x轴的垂线交椭圆于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e7170bb4a2ddcef39391a06c989162.png)
①试讨论直线AD是否恒过定点,若是,求出定点坐标;若不是,请说明理由.
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
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解答题-问答题
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(0.15)
解题方法
【推荐1】已知直线
,
,动点A,B分别在直线
,
上,
,P是线段AB的中点,记点P的轨迹为曲线E.
(1)求曲线E的方程.
(2)若直线
与E相交于M,N两点,在y轴上是否存在点C,使得
为正三角形?若存在,求出l的方程及点C的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338db305ea04d0af8bd3a1bebf33a21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da2d9d094f5d710cd00908915b01998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
(1)求曲线E的方程.
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d00a5df9d281dd4e1e45bf6a4d6fb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e856c15c61d7cb6ebd8daef542a4e7f.png)
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解答题-问答题
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【推荐2】已知椭圆C:
过点
,过其右焦点
且垂直于x轴的直线交椭圆C于A,B两点,且
.
(1)求椭圆C的方程;
(2)若直线l:
与椭圆C交于E,F两点,线段EF的中点为Q,在y轴上是否存在定点P,使得∠EQP=2∠EFP恒成立?若存在,求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe44fc04812c2b7b1f423b32697b5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91d06ded604fc63817e50f7fbf7c0ce.png)
(1)求椭圆C的方程;
(2)若直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f99f15038b4e789561a76c42be710f.png)
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【推荐1】已知椭圆
,点
在
上,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8feee30fadc432deace534d528feb16b.png)
(1)求出直线
所过定点
的坐标;(不需要证明)
(2)过A点作
的垂线,垂足为
,是否存在点
,使得
为定值?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2242ca20bd7ab3d41b128e10a4071521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8feee30fadc432deace534d528feb16b.png)
(1)求出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(2)过A点作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4110cc2b5dc3aabd585a8e9a81855a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4110cc2b5dc3aabd585a8e9a81855a12.png)
您最近一年使用:0次
解答题-证明题
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困难
(0.15)
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解题方法
【推荐2】已知点
、
分别为椭圆
的左、右焦点,直线
与椭圆
有且仅有一个公共点,直线
,
,垂足分别为点M、N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/561aff11-c69a-40aa-bc26-34b284386b88.png?resizew=188)
(1)求证:
;
(2)求证:
为定值,并求出该定值;
(3)求当
取得最大值时,四边形
的面积.
![](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/3c8377df6ca3008270ea82927c3b5a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c287201dc8f4b7e1a8dd41920654656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e39d0edf40348fcd8f68554c78352f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07ac8fe3821c440bdd0507f6fd6f763.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/561aff11-c69a-40aa-bc26-34b284386b88.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0354d888ad687a11009e40b654d1313f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01d96df9d5a3365390c2cd45113029.png)
(3)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e3b74fe69f38e0ef5317fc179a9e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3fea3fe4b4f81ac9d4763293048969.png)
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