已知椭圆
右焦点为
,已知椭圆短轴长为4,离心率为
.
(1)求椭圆的方程;
(2)若直线
与椭圆相交于M、N两点,线段MN垂直平分线与直线
及
轴和y轴相交于点D、E、G,直线GF与直线
相交于点
,记三角形EFG与三角形GDH的面积分别为
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3c8bff78931350f73e15cc10995cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
2023·天津·二模 查看更多[3]
天津市十二区重点学校2023届高三下学期毕业班联考(二)数学试题(已下线)2023年天津高考数学真题变式题16-20(已下线)专题3.8 圆锥曲线中的面积问题大题专项训练【六大题型】-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)
更新时间:2023-04-29 11:39:48
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相似题推荐
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(0.4)
真题
解题方法
【推荐1】已知方向向量为
的直线
过点
和椭圆
的焦点,且椭圆
的中心关于直线
的对称点在椭圆
的右准线上.
(1)求椭圆
的方程;
(2)是否存在过点
的直线
交椭圆
于点
,满足
(
为原点).若存在,求直线
的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b28136eeb933257da9dfdb7333d517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99bff3754ed2d0b8276e145e423a0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dad483f961dc9d4c1516cf9f60138c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/197a630c19fe8312d8629beece7ba085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/97c5cad7-0f51-4d35-9e9f-92c6bfa470fa.png?resizew=226)
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【推荐2】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
经过点
,左、右焦点分别
、
,椭圆的四个顶点围成的菱形面积为
.
(Ⅰ) 求椭圆
的方程;
(Ⅱ) 设
是椭圆
上不在
轴上的一个动点,
为坐标原点,过点
作
的平行线交椭圆于
、
两点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cd2eae5116601515585350e7b6ffa0.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/4e2031d209711b058f3d278ede3c1d33.png)
(Ⅰ) 求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ) 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/9f0009063fe00277645aff1be6e32471.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/c6577d89f5e9df4dbe97912c9331d375.png)
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【推荐1】已知椭圆
经过
,离心率为
.
(1)求椭圆
的方程;
(2)设点
分别为椭圆的右顶点、右焦点,经过点
作直线交椭圆于
两点,求四边形
面积的最大值(
为坐标原点).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de261e9b4defbc0be6440397031a87b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f7c6d3ef08124f98d3fdc40b1c3010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64921f3dee97b81666b1473c0fbad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】已知△ABC的两个顶点A,B的坐标分别为(
,0),(
,0),圆E是△ABC的内切圆,在边AC,BC,AB上的切点分别为P,Q,R,|CP|=2
,动点C的轨迹为曲线G.
(1)求曲线G的方程;
(2)设直线l与曲线G交于M,N两点,点D在曲线G上,
是坐标原点
,判断四边形OMDN的面积是否为定值?若为定值,求出该定值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
(1)求曲线G的方程;
(2)设直线l与曲线G交于M,N两点,点D在曲线G上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42813b07a70e6d132211d2b1c5877ca.png)
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【推荐1】已知椭圆
的两个焦点分别为
和
,过点
的直线与椭圆相交于x轴上方的A,B两点,且
.
![](https://img.xkw.com/dksih/QBM/2018/5/2/1936784173539328/1937183735922688/STEM/6eec97370c0749f49e8a7a64ee38cc7c.png?resizew=232)
(1)求椭圆的离心率;
(2)(ⅰ)求直线AB的斜率;
(ⅱ)设点C与点A关于坐标原点对称,直线
上有一点
在
的外接圆上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5076829e649b3f3866d4a7e07a5713e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcca15240f12dc69fe0e7a7eeefdc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c160f151b33df046ee006768cafe83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c03e5323d3aa2c9b5cdf5519d769fd.png)
![](https://img.xkw.com/dksih/QBM/2018/5/2/1936784173539328/1937183735922688/STEM/6eec97370c0749f49e8a7a64ee38cc7c.png?resizew=232)
(1)求椭圆的离心率;
(2)(ⅰ)求直线AB的斜率;
(ⅱ)设点C与点A关于坐标原点对称,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c429b542abf0ebee74a239b4857cf88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e81cfa0f2f745b0bccc0c614046d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208d4182b62fad2fb8b500adf6ef8005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ab7024f73ff0cb7e6a48197538a91e.png)
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【推荐2】在平面直角坐标系
中,已知椭圆C:
(
)的左、右焦点分别为
,且焦距为
,椭圆C的上顶点为B,且
.
(1)求椭圆C的方程;
(2)若直线l过点
,且与椭圆C交于M,N两点(不与B重合),直线BM与直线BN分别交直线
于P,Q两点.判断是否存在定点G,使得点P,Q关于点G对称,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea617baa0c3518c68a4ba38a66d4269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e78e65b66230c8ccb7193ac69ffc85.png)
(1)求椭圆C的方程;
(2)若直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ebd2da016e7029c4dd72b9e377190c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
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