已知椭圆C:
(
)过点
,且离心率为
.
(1)求椭圆C的方程;
(2)过点
(
)的直线l(不与x轴重合)与椭圆C交于A,B两点,点C与点B关于x轴对称,直线AC与x轴交于点Q,试问
是否为定值?若是,请求出该定值,若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269a51e0f77f63bae2df3dc8b1d4f455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bda892497cea43df67db57b4e2a07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31bb152aca1652e568be56bba14b048.png)
更新时间:2022-02-03 22:27:15
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【推荐1】已知椭圆
的两个焦点分别为
,过
的直线
与
相交手
两点.当
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轴时,
.
(1)求
的方程;
(2)当
的内切圆面积取得最大值时,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee4e8dd17eb6d8e3486b860872f21a8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
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【推荐2】已知
是椭圆
的左顶点,且
经过点
.
(1)求
的方程;
(2)若直线
与
交于
两点,且
,求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e788c747c01bb744d887029acaefee87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c6162828793e697cb1ad643b287c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82acfc83fac146723a9e26a9ec191595.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764ab1262baa09cd62fb6ddba39df2ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】求满足下列条件的圆锥曲线的标准方程:
(1)短轴长等于
,离心率等于
的椭圆;
(2)与椭圆
共焦点,且过点
的双曲线.
(1)短轴长等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)与椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57fbdcf5ed16ea6ae22fe7446d9aab97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92418f910b93502041350259b221ea34.png)
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【推荐2】设椭圆
:
的左、右焦点分别为
,过
的直线交椭圆于
两点,若椭圆
的离心率为
,
的周长为16.
(Ⅰ)求椭圆
的方程;
(Ⅱ)设不经过椭圆的中心而平行于弦
的直线交椭圆
于点
,设弦
的中点分别为
.证明:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)设不经过椭圆的中心而平行于弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3421e6965c86b4cca2a503385b3cc156.png)
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【推荐1】设
,
为直角坐标平面内x轴.y轴正方向上的单位向量,若
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(1)求动点M(x,y)的轨迹C的方程;
(2)设曲线C上两点A.B,满足①直线AB过点(0,3),②若
,则OAPB为矩形,试求直线AB的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a47914f8d35a705d60d6bfb99ea044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e866acd014a7cc973c2d8270b28a433b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e340d453312c87ff93d3b2bda7aa261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d299207b25779fb8fb3c1a8f0fdac1d7.png)
(1)求动点M(x,y)的轨迹C的方程;
(2)设曲线C上两点A.B,满足①直线AB过点(0,3),②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e97587830e538ace9ace69a02cda63.png)
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【推荐2】已知椭圆
的离心率
,焦距为2.
(1)求椭圆
的方程;
(2)已知椭圆
与直线
相交于不同的两点
,且线段
的中点不在圆
内,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe2d78f43611bad0d264eb3222f2472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知椭圆
:
的焦距为4,且点
在椭圆
上,直线
经过椭圆
的左焦点
,与椭圆
交于
两点,且其斜率为
,
为坐标原点,
为椭圆
的右焦点.
(1)求椭圆
的方程;
(2)设
,延长
分别与椭圆
交于
两点,直线
的斜率为
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fdcdf9aa24a8ed24613dd0b4ec6596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f5076289823db419f94e9c0c8f4aafd9.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/3e2fd6df03fd6e945e2c1cb44bca014b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fe66363e4aac9224c34ca788331c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec56d586906ebaaa3c32c85a415f4c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
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【推荐2】已知椭圆C:
的左、右焦点分别是E、F,离心率
,过点F的直线交椭圆C于A、B两点,
的周长为16.
(1)求椭圆C的方程;
(2)若圆D:
与椭圆C交于M、N两点,点P为椭圆C上一动点,直线PM、PN与x轴分别交于G、H两点,且G、H两点在y轴同侧,O为原点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f25cd3e0a4988d48763f36cc022fcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(1)求椭圆C的方程;
(2)若圆D:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b10616eaf32a653c853043bfea5392f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1221e6b52393d0a1f58c9b791751f7.png)
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