名校
1 . 已知右焦点为
的椭圆
与直线
相交于
两点,且
.
(1)求椭圆
的方程;
(2)
为坐标原点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8679d709d10043947119f4456014a64.png)
是椭圆
上不同的三点,并且
为
的重心,试探究
的面积是否为定值.若是,求出这个定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446e946ee3c0f1527e04f6bddbdd4b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8048c3513eb9cc89ad96a0522a5711de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ca9ea5c24e205bf7e26d1f5aa49fd.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8679d709d10043947119f4456014a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2018/2/6/1876312406515712/1877027598180352/STEM/5f0c670d2aad4cf1a0408672411636c0.png?resizew=280)
您最近一年使用:0次
2016-12-04更新
|
1347次组卷
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9卷引用:2017届江西省师大附中、临川一中高三1月联考数学(理)试卷
真题
名校
2 . 已知椭圆
:
的两个焦点与短轴的一个端点是直角三角形的三个顶点,直线
:
与椭圆
有且只有一个公共点T.
(Ⅰ)求椭圆
的方程及点
的坐标;
(Ⅱ)设
是坐标原点,直线
平行于
,与椭圆
交于不同的两点
、
,且与直线
交于点
,证明:存在常数
,使得
,并求
的值.
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73701e1a6ce2f688821bcb71d0d9ca24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2016-12-04更新
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8043次组卷
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23卷引用:江西省南昌十中2020届高三高考适应性考试文科数学试题
江西省南昌十中2020届高三高考适应性考试文科数学试题2016年全国普通高等学校招生统一考试理科数学(四川卷精编版)2017届湖南省长郡中学、衡阳八中等十三校重点中学高三第二次联考理科数学试卷天津市第一中学2017届高三下学期第五次月考数学(文)试题2019届高考数学人教A版理科第一轮复习单元测试题:第九章 解析几何(已下线)实战演练8.3-2018年高考艺考步步高系列数学智能测评与辅导[理]-圆锥曲线的综合应用上海市市东中学2016-2017学年高三下学期第一次测验数学试题安徽省部分省示范中学2018-2019学年高二下学期期中数学(文)试题江苏省扬州中学2019-2020学年高三下学期4月月考数学试题四川省宜宾市叙州区第二中学校2019-2020学年高二下学期第四学月考试数学(文)试题(已下线)专题18 解析几何综合-五年(2016-2020)高考数学(文)真题分项(已下线)专题18 解析几何综合-五年(2016-2020)高考数学(理)真题分项辽宁省辽阳市七校联合体2019-2020学年高三上学期12月份月考理科数学试题广东省深圳市高级中学2020-2021学年高二下学期期中数学试题(已下线)考点44 圆锥曲线中的综合性问题-备战2022年高考数学典型试题解读与变式(已下线)专题8 利用仿射变换轻松解决圆锥曲线问题 微点3 利用仿射变换轻松解决圆锥曲线问题综合训练(已下线)专题24 圆锥曲线中的存在性、探索性问题 微点1 圆锥曲线中的存在性问题(已下线)2016年全国普通高等学校招生统一考试理科数学(四川卷参考版)(已下线)第五篇 向量与几何 专题3 仿射变换与反演变换 微点5 仿射变换综合训练(已下线)大招27仿射变换四川省成都市石室中学2023-2024学年高二下学期5月月考数学试题专题37平面解析几何解答题(第二部分)
10-11高一下·海南·期末
真题
名校
3 . 在直角坐标系
中,椭圆
的左、右焦点分别为
、
,
也是抛物线
的焦点,点
为
与
在第一象限的交点,且
.
(1)求
的方程;
(2)平面上的点
满足
,直线
,且与
交于
、
两点,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e48d1edbfb6a5a48f9a95551d1dbc2.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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c7fc8e284e4aafd93a630d50a53930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/2f2d198583d6deaa1b5c1daf32166251.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)平面上的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a224a2a8073975783fbbc15dc6842dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8269311f40cc5c8e9c47d43b0bdc30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/1695034a4c212e5568fe41625fd2a417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2016-12-04更新
|
1235次组卷
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13卷引用:江西省瑞昌市第二中学2016-2017学年高二下学期第二次段考数学(理)试题
江西省瑞昌市第二中学2016-2017学年高二下学期第二次段考数学(理)试题(已下线)海南省海南中学10-11学年高一下学期期末考试数学(1班)2015-2016学年山西太原五中高二上学期期末理科数学试卷2015-2016学年福建省泉州市四校高二上期末理科数学试卷四川省南充市嘉陵一中2018届高三上学期期中考试理数学试题(已下线)黄金30题系列 高二年级数学(理) 大题好拿分【提升版】(已下线)黄金30题系列 高二年级数学(文) 大题好拿分【提升版】(已下线)黄金30题系列 高二年级数学江苏版 大题好拿分【提升版】【市级联考】陕西省西安市2017-2018学年高二下学期期末考试数学(文)试题(已下线)秒杀题型07 圆锥曲线中的直角弦-2020年高考数学试题调研之秒杀圆锥曲线压轴题四川省德阳市2022届高三第二次质量监测考试文科数学试题四川省德阳市2022届高三质量监测考试(二)数学(理)试题2008年普通高等学校招生考试数学(理)试题(琼、宁卷)
解题方法
4 . 已知点
是椭圆
的焦点,且椭圆
上的点到点
的最大距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/c49842da-6c7b-4f51-9668-5f2bb39d4a04.png?resizew=251)
(1)求椭圆
的方程;
(2)设直线
,
,若
均与椭圆
相切,试在
轴上确定一点
,使点
到
的距离之积恒为1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f190b17530d81d927c358ac84757a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/c49842da-6c7b-4f51-9668-5f2bb39d4a04.png?resizew=251)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8e1ebc1b3f6e793dd06aac312dc9bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491b175e4522bece0a44bcb3d5605bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
您最近一年使用:0次
5 . 如图,已知点
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/ac8e04d8-298f-43ad-b8bc-d00cacb3efa6.png?resizew=123)
直线
,
为平面上的动点,过
作直线
的垂线,垂足为点
,且
.
(1)求动点
的轨迹方程
;
(2)过点
的直线交轨迹
于
两点,交直线
于点
,已知
,
,求
的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/ac8e04d8-298f-43ad-b8bc-d00cacb3efa6.png?resizew=123)
直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4180dae966f648d368a10edf3b7e3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a027756ba55589fd29afcc4050eee470.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e41f4f388a3a5465f2cb919c49b974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8243aa5ddb0fbf9e98f019de7a5ea810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
您最近一年使用:0次
2019-01-30更新
|
1325次组卷
|
6卷引用:2011年江西省莲塘一中高二上学期期末终结性数学理卷
解题方法
6 . 已知椭圆
:
,其中
,
为左、右焦点,且离心率
,直线
与椭圆交于两不同点
,
.当直线
过椭圆
右焦点
且倾斜角为
时,原点
到直线
的距离为
.
![](https://img.xkw.com/dksih/QBM/2015/4/13/1572069106720768/1572069112512512/STEM/ac96d7fe-3101-4368-9b1b-997a2deb197b.png?resizew=204)
(Ⅰ)求椭圆
的方程;
(Ⅱ)若
,当
面积为
时,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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a0a43a5b4d5b4bb4e3e936b032a80a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](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/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2015/4/13/1572069106720768/1572069112512512/STEM/ac96d7fe-3101-4368-9b1b-997a2deb197b.png?resizew=204)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ae387b524a622bc8a8aa34a65100b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2969ed9ba40bbcb2a5aa64d44f099785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4138c84de38df17fcc8571ededf847c4.png)
您最近一年使用:0次
2016-12-03更新
|
2665次组卷
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5卷引用:2015-2016学年江西南昌二中高二上学期期中理科数学试卷
2012·福建福州·一模
名校
7 . 如图,圆
与
轴相切于点
,与
轴正半轴相交于
两点(点
在点
的下方),且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/9f1e1599-2835-4ff8-ad46-aed81e934d71.png?resizew=167)
(1)求圆
的方程;
(2)过点
任作一条直线与椭圆
相交于两点
,连接
,求证:
.
![](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/c6614916203fe0146d6797138da3db4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.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/cbc5931d25e50c27e61e78347f9370e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/9f1e1599-2835-4ff8-ad46-aed81e934d71.png?resizew=167)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c763113a1fc48e8acc83787b8cd24eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729cf1d18cbb0ff509b51be7c445c34e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5ce23462dfd28929430b74b9590940.png)
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2016-12-01更新
|
1807次组卷
|
21卷引用:2016届江西省高安中学等九校高三下学期联考文科数学试卷
2016届江西省高安中学等九校高三下学期联考文科数学试卷【校级联考】新余四中、上高二中2019届高三第一次联考数学(文)试题(已下线)2012届福建省福州市高三综合练习理科数学试卷(已下线)2012届福建省福州市高三综合练习文科数学试卷2015届陕西西北工业大学附中高三下学期四模考试理科数学试卷2015届陕西西北工业大学附中高三下学期四模考试文科数学试卷2016届山西省康杰中学等校高三上学期第二次联考文科数学试卷2015-2016学年广东广州执信中学高二下期末文科数学试卷2017届甘肃高台县一中高三文上学期检测五数学试卷2017届甘肃省高台县第一中学高三上学期期末考试文数试卷2017届湖北省黄冈市高三3月份质量检测数学(文)试卷2017届湖北省黄冈市高三3月份质量检测数学(理)试卷2017届宁夏中卫市高三第二次模拟考试数学(文)试卷甘肃省武威第二中学2018届高三上学期期末考试数学(文)试题【全国校级联考】峨眉山市第七教育发展联盟2018届高考适应性考试文科数学试题【市级联考】湖南省衡阳市2019届高三下学期第一次联考数学(文)试题【全国百强校】湖南省衡阳市第一中学2018-2019学年高二下学期第一次月考数学(文)试题上海市延安中学 2018-2019学年高二上学期期末数学试题2019届湖南省衡阳市高三第一次模拟文科数学试题河南省焦作市第一中学2022-2023学年高二下学期期中数学试题湖南省长沙市雅礼中学2024届高三下学期月考(七)数学试题
2011·江西宜春·三模
8 . 如图,已知直线
与抛物线
相切于点
,且与
轴交于点
,
为坐标原点,定点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/1ffee7a3-d041-4eba-8735-159aee6a9f0a.png?resizew=220)
(1)若动点
满足
,求点
的轨迹
;
(2)若过点
的直线
(斜率不等于零)与(1)中的轨迹
交于不同的两点
(
在
之间),试求△OBE与△OBF面积之比的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/1ffee7a3-d041-4eba-8735-159aee6a9f0a.png?resizew=220)
(1)若动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b924555ca17b0fb4b2e1e83afa6a8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5049af0aacd6e6885d43fd814648de.png)
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13-14高三上·江西赣州·期中
名校
解题方法
9 . 已知抛物线
的焦点为F2,点F1与F2关于坐标原点对称,以F1,F2为焦点的椭圆C过点
.
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)设点![](https://img.xkw.com/dksih/QBM/2013/11/28/1571412431994880/1571412438073344/STEM/fb38d810da354f8cba10e495a86416bd.png)
,过点F2作直线
与椭圆C交于A,B两点,且
,若
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2d08ec1910c9f56333cbe6d419299.png)
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)设点
![](https://img.xkw.com/dksih/QBM/2013/11/28/1571412431994880/1571412438073344/STEM/fb38d810da354f8cba10e495a86416bd.png)
![](https://img.xkw.com/dksih/QBM/2013/11/28/1571412431994880/1571412438073344/STEM/057693b46638462f8ec32e5988db98dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf76b2d9212c383f86ec3262d2f2c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65ad0a098d5860834005d46a6f4cffa.png)
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2012·江西·二模
10 . 在平面直角坐标系中,已知焦距为4的椭圆
的左、右顶点分别为
,椭圆C的右焦点为F,过
作一条垂直于x轴的直线与椭圆相交于
,若线段
的长为
.
(1)求椭圆C的方程;
(2)设
是直线
上的点,直线
与椭圆C分别交于点M、N,求证:直线MN必过x轴上的一定点,并求出此定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://img.xkw.com/dksih/QBM/2012/3/7/1570791114072064/1570791119609856/STEM/f0e17516744e488caf50afc75c063e74.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530840ec565f8b0db2aedb804ff985f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cce6cac0fdd4b1a434af8bcaec8fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5991e9ec7666f533a528a4173c58f0ff.png)
(1)求椭圆C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb6c426ec86fd5d88c0534a85edfffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3680f7d0d96efc5b207c8e9552e21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b59ab01ffec649e05a023c073c4173.png)
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