已知椭圆
,椭圆
的焦点在
轴上,且与椭圆
离心率相同,且椭圆
经过点
.
(1)求椭圆
的方程;
(2)若点
在椭圆
上,过点
分别作椭圆
的切线,切点分别是
,此两条切线分别与椭圆
相交
两点,证明:切点
分别是线段
,线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfaca352d579b991428b3d794c91484c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc94fc891d8338f89f75ca900126eed.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
2019·安徽合肥·模拟预测 查看更多[2]
更新时间:2020-04-28 09:24:00
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相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知椭圆
经过点
,离心率为
.过点
的直线l与椭圆E交于不同的两点M,N.
(1)求椭圆E的方程;
(2)设直线AM和直线AN的斜率分别为
和
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
(1)求椭圆E的方程;
(2)设直线AM和直线AN的斜率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6f62ec9c0e58b3f1c363158269b14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ff131c92aa9e10f696d374216cdcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dbfb0cd956642aaa37549cbfdada126.png)
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【推荐2】在直角坐标平面上,O为原点,M为动点,
,
.过点M作MM1⊥
轴于M1,过N作NN1⊥
轴于点N1,
.记点T的轨迹为曲线C,点A(5,0)、B(1,0),过点A作直线
交曲线C于两个不同的点P、Q(点Q在A与P之间).
(Ⅰ)求曲线C的方程;
(Ⅱ)证明不存在直线
,使得
;
(Ⅲ)过点P作
轴的平行线与曲线C的另一交点为S,若
,证明
.
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/d57a0795b40d40b7993097b977441e55.png?resizew=73)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/16e36affad894489a7edd81be03f9763.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/660d76ce9d694360ba1a37dd696fa2df.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/67e2f50d80214d309db802ef94a6dd7e.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/13a17d69e7e44675803a214223cee7d2.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/d69b73a9a8884a009a1812c96e1fcd50.png?resizew=9)
(Ⅰ)求曲线C的方程;
(Ⅱ)证明不存在直线
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/d69b73a9a8884a009a1812c96e1fcd50.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/e122af8bab074b7181358f3bfc10ab2e.png?resizew=73)
(Ⅲ)过点P作
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/660d76ce9d694360ba1a37dd696fa2df.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/ae06f4dd3689405b893f3a2a11d12b8a.png?resizew=71)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2024324451098624/2038783136497664/STEM/40c4660b2c3c440687eea4dc89f127fc.png?resizew=68)
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解题方法
【推荐1】已知椭圆C:
的上端点为
,离心率为
.
(1)求椭圆C的方程;
(2)设经过点
且不经过点M的直线l与椭圆C相交于A,B两点.若
,
分别为直线
,
的斜率,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆C的方程;
(2)设经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8833ba3833480237f47774984958c01d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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【推荐2】已知抛物线
的焦点为
,过点
作直线
交抛物线
于
、
两点;椭圆
的中心在原点,焦点在
轴上,点
是它的一个顶点,且其离心率
.
(1)求椭圆
的方程;
(2)经过
、
两点分别作抛物线
的切线
、
,切线
与
相交于点
.证明:点
定在直线
上;
(3)椭圆
上是否存在一点
,经过点
作抛物线
的两条切线
、
、
为切点),使得直线
过点
?若存在,求出切线
、
的方程;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)经过
![](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/c5db41a1f31d6baee7c69990811edb9f.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/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
(3)椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b763b6f4f86b652af33e33eeb6d91796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b763b6f4f86b652af33e33eeb6d91796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0336c6b1ae6ac7174dc0110c25dab9ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8a0ceafee18d111a8f7b5a2535baff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74bcb2642f3bdeb0f6d67b5baca43a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0336c6b1ae6ac7174dc0110c25dab9ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d4bb8853c09dee1a4bed42a2bb5f8c.png)
您最近一年使用:0次
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【推荐1】已知椭圆
的离心率为
,椭圆的短轴端点与双曲线
的焦点重合,过点
的直线
与椭圆
相交于
、
两点.
(1)求椭圆
的方程;
(2)若以
为直径的圆过坐标原点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b9de5884332cbeb80ab85aa50c454b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c153027427477bcd0a7228b14ce96cc5.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)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】已知椭圆
过点
,焦距为2.
(1)求椭圆C的方程;
(2)过点
作两条直线
,
且
,
切椭圆C于M,
交椭圆C于A,B不同两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
(1)求椭圆C的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09514f4c8a9a7fa153b12a491294f45.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/1ce08b357f11ef44c3e8207ac574422a.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/3ace585d3cc2e113a0927cdf9e56756a.png)
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