已知焦点在x轴上的椭圆C过定点
,离心率为
.过点
的直线l与椭圆交于不同的两点M,N,
(1)求椭圆C的方程.
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c10f14aae6fb21e047ecb39cdf40c0.png)
(1)求椭圆C的方程.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79188647c574441c2414c3781a0ef543.png)
更新时间:2022-12-27 23:08:14
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解答题
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适中
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【推荐1】已知椭圆
过点
,且离心率
.
(1)求椭圆方程;
(2)若直线
与椭圆交于不同的两点
,且线段
的垂直平分线过定点
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60abe74c6c4ee851937ceea1cffa70c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964e2ff97122345be34c212a9ee71a76.png)
(1)求椭圆方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a552e4e4bbf12ba59bfbea9fa53b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5182b8cf23d443b08db67dda809112ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da265da7dc8e40f22ac9eb76f8b3b4b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f06c21b1808cb2b459ea67105bf10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b61ed9fd6fbfbea7a406c80a7b92df8.png)
![](https://img.xkw.com/dksih/QBM/2018/1/30/1871416843362304/1873655992123392/STEM/ce4afb1839014be4b8046dc3cb54751f.png?resizew=227)
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【推荐2】已知
,
是椭圆
的左、右焦点,
为原点,
在椭圆上,线段
与
轴的交点
满足
.
(1)求椭圆的标准方程;
(2)过椭圆右焦点
作直线
交椭圆于
,
两点,交
轴于
点,若
,
,求
.
![](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/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c567e1d1fa8bf76bd413c7aa8e6354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09c96e679d6317bf8df071d93534d01.png)
(1)求椭圆的标准方程;
(2)过椭圆右焦点
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d431b164408ad058bd94072164b11bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b37c19e512e56264a511cd62e0a96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
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【推荐3】已知点
在椭圆
:
上,椭圆焦点
与椭圆短轴上的两个顶点
、
满足条件
.
(1)求椭圆
的标准方程及离心率;
(2)若斜率为
的直线
与椭圆
交于
、
两点,同时与
轴交于点
,并满足
.试求点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f122dc124d609e6afd281abefbbe0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e53330d359fc5380e1963f78d2f3f08.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d54dc7786f989daf950a82477903c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】已知椭圆
,离心率为
,点
在椭圆C上.
(1)求椭圆C的标准方程;
(2)记A是椭圆的左顶点,若直线l过点
且与椭圆C交于M,N两点(M,N与A均不重合),设直线AM,AN的斜率分别是
.试问
是否为定值?若是,求出定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc2210a7e09298897f6585ad08a70d3.png)
(1)求椭圆C的标准方程;
(2)记A是椭圆的左顶点,若直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62ec9eb13c5cfca501ff84357595755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa0e5e0c2447e94026292646458952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
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【推荐2】已知椭圆E:过点
,离心率为
.
(1)求椭圆E的方程;
(2)过椭圆E的右焦点F作斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
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【推荐1】已知椭圆
的左、右焦点分别为
,
,左顶点为A,上顶点为B,O为坐标原点,
,
.
(1)求C的方程;
(2)过
且斜率为k的直线l交C于M,N两点,若点
在以MN为直径的圆内,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.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/9d903774b698c56e0d8d1249fb7e0956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be10a2986d4609d8a4056da49fe8c4ff.png)
(1)求C的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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【推荐2】如图,直线
与椭圆
交于M,N两点,与直线
交于点P,且椭圆E的离心率为
.
(1)若点M在第二象限,且
的最小值为
(其中O为坐标原点),求椭圆E的方程;
(2)若椭圆E的方程为(1)中所求方程,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4a45e79f51c7b5a9428f4cf2ab5c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ca7d6602797c7bf5503fc7859e3225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3c5e06260ca5705c35a8f24b8c371d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/c3664274-5131-4327-a378-457210719fec.png?resizew=227)
(1)若点M在第二象限,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b733fa4aa213467acd883af989d01042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(2)若椭圆E的方程为(1)中所求方程,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538a898ea19d8381b4772a555d66a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b8623d86d3304fa39e8da829949e0.png)
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