已知椭圆
的离心率为
,且过点
.
(1)求C的方程;
(2)设过点
的直线l与C相交于A、B两点(点A在点P和点B之间),若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
(1)求C的方程;
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd2d014297cd268af6ff84c04032d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2020-04-27 22:05:53
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【推荐1】已知椭圆E的两焦点分别为
,经过点
.
(1)求椭圆E的方程;
(2)过
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,设A,B两点关于x轴的对称点分别是C,D,求四边形ACDB的外接圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728fc9943477dad6ef54847c709c4d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2d08ec1910c9f56333cbe6d419299.png)
(1)求椭圆E的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebd15ae92409aaf3ff37b69e41ff007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c395239d94992e865a29a177b95ab6ff.png)
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【推荐2】已知椭圆
的中心在坐标原点,左右焦点分别为
和
,且椭圆
经过点
.
(1)求椭圆
的标准方程;
(2)过椭圆的右顶点
作两条相互垂直的直线
,
,分别与椭圆交于点
(均异于点
),求证:直线
过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c1c99171ae3215a2e99a5deb287798.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过椭圆的右顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】已知A、B分别是椭圆
的左、右顶点,P为椭圆C的下顶点,F为其右焦点
点M是椭圆C上异于A、B的任一动点,过点A作直线
轴
以线段AF为直径的圆交直线AM于点A、N,连接FN交直线l于点
点G的坐标为
,且
,椭圆C的离心率为
.
求椭圆C的方程;
试问在x轴上是否存在一个定点T,使得直线MH必过该定点T?若存在,求出点T的坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c9b4c6eb0b7161311b2984886fc793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9703d5031955eb2f2511cb641314fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a5995a1e0d57630ebdf330be117524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a5fa064a855ec09fa9806d73aeff07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a50e38f8f1fb6a500b1f9980a2627ab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
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【推荐2】已知椭圆方程
为:
,
椭圆的右焦点为
,离心率为
,直线
:
与椭圆
相交于
、
两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a03fd02ebf5d4da6dbbe0765d39acc2.png)
(1)椭圆的方程及求
的面积;
(2)在椭圆上是否存在一点
,使
为平行四边形,若存在,求出
的取值范围,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/3a03fd02ebf5d4da6dbbe0765d39acc2.png)
(1)椭圆的方程及求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)在椭圆上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e902eb263971b466d0fcd91c56b453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f645d4b09fba53f971172cd2602c691.png)
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【推荐1】已知椭圆C:
=1(a>b>0)的左、右焦点分别为F1,F2,P是椭圆上一动点(与左、右顶点不重合).已知
PF1F2的面积的最大值为
,椭圆C的离心率为
.
(1)求椭圆C的方程;
(2)过F2的直线l交椭圆C于A,B两点,过A作x轴的垂线交椭圆C与另一点Q(Q不与A,B重合).设
ABQ的外心为G,求证
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199f454cb22c34dfa82798ebd6c9054c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的方程;
(2)过F2的直线l交椭圆C于A,B两点,过A作x轴的垂线交椭圆C与另一点Q(Q不与A,B重合).设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8483ccac2b76809b8c2feaac1c153a.png)
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【推荐2】已知椭圆的中心为原点O,右焦点为
,四个顶点围成的四边形的面积为
.
(1)求椭圆的方程;
(2)设A,B是椭圆上的两点,若直线OA,AB,OB的斜率依次成等比数列(公比不为1),试问:
,
,
能否构成等比数列?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
(1)求椭圆的方程;
(2)设A,B是椭圆上的两点,若直线OA,AB,OB的斜率依次成等比数列(公比不为1),试问:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c388f1f7160d3397610633dfde015fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8b3616d8d33f54ddac1c485a95a7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a82596d3e0eea2ea14448e3ede29c2.png)
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