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1 . 已知椭圆C:
1(a>b>0)的离心率e
,且点P(
,1)在椭圆C上.
(1)求椭圆C的方程;
(2)若椭圆C的左焦点为F,右顶点为A,点M(s,t)(t>0)是椭圆C上的动点,直线AM与y轴交于点D,点E是y轴上一点,EF⊥DF,EA与椭圆C交于点G,若△AMG的面积为2
,求直线AM的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22ecb9b0a87ab5098571bdf80441231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b945ef245f4e808511e0069fa05ed6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
(1)求椭圆C的方程;
(2)若椭圆C的左焦点为F,右顶点为A,点M(s,t)(t>0)是椭圆C上的动点,直线AM与y轴交于点D,点E是y轴上一点,EF⊥DF,EA与椭圆C交于点G,若△AMG的面积为2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
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2020-03-15更新
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4卷引用:天津市西青区杨柳青第一中学2021-2022学年高二实验班下学期期末适应性测试数学试题
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2 . 如图,在平面直角坐标系xOy中,椭圆C:
(a>b>0)的离心率为
,短轴长是2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/58863c5c-eb69-4084-a30c-d486fffbf732.png?resizew=181)
(1)求椭圆C的方程;
(2)设椭圆C的下顶点为D,过点D作两条互相垂直的直线l1,l2,这两条直线与椭圆C的另一个交点分别为M,N.设l1的斜率为k(k≠0),△DMN的面积为S,当
,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/58863c5c-eb69-4084-a30c-d486fffbf732.png?resizew=181)
(1)求椭圆C的方程;
(2)设椭圆C的下顶点为D,过点D作两条互相垂直的直线l1,l2,这两条直线与椭圆C的另一个交点分别为M,N.设l1的斜率为k(k≠0),△DMN的面积为S,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f398ffe266e148d499d31864f45df6.png)
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2019-01-10更新
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1054次组卷
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2卷引用:天津市和平区耀华中学2019-2020学年高二上学期期末数学试题
3 . 已知椭圆
:
的离心率
,左顶点为
,过点A作斜率为
的直线
交椭圆
于点
,交
轴于点
,
点为坐标原点.
(1)求椭圆
的方程;
(2)已知
为
的中点,是否存在定点
,对于任意的
都有
,若存在,求出点
的坐标;若不存在说明理由;
(3)若过
点作直线
的平行线交椭圆
于点
,求
的最大值.
![](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/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0297c11050f2e39f82bb2cdf810d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31468393c4433f29096f13b20258fda4.png)
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2018-02-09更新
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3卷引用:【校级联考】天津市七校(静海一中、宝坻一中、杨村一中等)2018-2019学年高二上学期期末考试数学试题
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解题方法
4 . 已知椭圆
的中心在原点,离心率为
,右焦点到直线
的距离为2.
(1)求椭圆
的方程;
(2)椭圆下顶点为
,直线
(
)与椭圆相交于不同的两点
,当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e307be89a2ae01bd3fb8442b4e12af.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)椭圆下顶点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b485b62d004d52fb31d6ed99ccb7669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2016-12-04更新
|
611次组卷
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4卷引用:天津市和平区2017-2018学年高二上学期期末考试数学(文)试题