名校
解题方法
1 . 已知椭圆C:
(
)的焦距为
,且右焦点F与短轴的两个端点组成一个正三角形.若直线l与椭圆C交于
、
,且在椭圆C上存在点M,使得:
(其中O为坐标原点),则称直线l具有性质H.
(1)求椭圆C的方程;
(2)若直线l垂直于x轴,且具有性质H,求直线l的方程;
(3)求证:在椭圆C上不存在三个不同的点P、Q、R,使得直线
、
、
都具有性质H.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c503ef0e5c387af970ad33058719718.png)
(1)求椭圆C的方程;
(2)若直线l垂直于x轴,且具有性质H,求直线l的方程;
(3)求证:在椭圆C上不存在三个不同的点P、Q、R,使得直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42af8cdea9c5269c17aebb086afdd136.png)
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2020-02-07更新
|
325次组卷
|
5卷引用:2016届上海市杨浦区高三4月质量调研(二模)(理)数学试题
名校
2 . 已知椭圆
,四点
中恰有三点在椭圆上.
(1)求椭圆C的方程
(2)椭圆C上是否存在不同的两点M,N关于直线
对称?若存在,请求出直线MN的方程,若不存在,请说明理由.
(3)设直线l不经过点
且与C相交于A,B两点,若直线
与直线
的斜率之和为1,求证直线l必过定点,并求出这个定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10137ed8944f28b232b2eefb3310f606.png)
(1)求椭圆C的方程
(2)椭圆C上是否存在不同的两点M,N关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
(3)设直线l不经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3de68627f7f3d7f81b61bf743f311ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9019a986b3ba5fcefced99c566b5329c.png)
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2019-12-12更新
|
369次组卷
|
2卷引用:上海市向明中学2018-2019学年高二上学期12月月考数学试题
名校
解题方法
3 . 已知椭圆
离心率为
,四个顶点构成的四边形的面积是4.
(1)求椭圆C的标准方程;
(2)若直线
与椭圆C交于P,Q均在第一象限,直线OP,OQ的斜率分别为
,
,且
(其中O为坐标原点).证明:直线l的斜率k为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的标准方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.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/a7e9c9c51562c58d7347a4c7f17f47b1.png)
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2020-02-21更新
|
439次组卷
|
3卷引用:2019届重庆市合川瑞山中学高三下学期模拟训练(理)数学试题
2019届重庆市合川瑞山中学高三下学期模拟训练(理)数学试题2019届湖北省宜昌市第一中学高三模拟训练(三)数学(理)试题(已下线)第2章《圆锥曲线与方程》章节复习巩固(基础练)-2021-2022学年高二数学同步训练精选新题汇编(人教A版选修2-1)
名校
解题方法
4 . 已知斜率为k的直线l与椭圆
交于A,B两点,线段AB的中点为
.
(1)证明:
;
(2)设F为C的右焦点,P为C上一点,且
.证明:
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92eef8af37e6bc1a2381208815fe78d5.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4694630e8549e5c38fdace8fd0af11f5.png)
(2)设F为C的右焦点,P为C上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42529f0537a9888682905a627708212d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648ed9242d586d8bad2936ec9cab8262.png)
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2020-04-30更新
|
137次组卷
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2卷引用:安徽省滁州市定远县第二中学2018-2019学年高二上学期第三次调研考试数学(理)试题
名校
解题方法
5 . 已知
分别为椭圆
的左、右焦点,
为该椭圆的一条垂直于
轴的动弦,直线
与
轴交于点
,直线
与直线
的交点为
.
(1)证明:点
恒在椭圆
上.
(2)设直线
与椭圆
只有一个公共点
,直线
与直线
相交于点
,在平面内是否存在定点
,使得
恒成立?若存在,求出该点坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0194657c8bebd4a546cc4397090342.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/183b6a0cef4256c9696a5bca31053da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)证明:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a8b5b7ae8b20d658d9f7e843aba7a4.png)
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2020-02-18更新
|
1332次组卷
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10卷引用:2020届湖南省高三上学期期末统测数学(文)试题
6 . 已知椭圆
的离心率为
,且过点
.
(1)求椭圆E的方程;
(2)若过点
的任意直线与椭圆E相交于A,B两点,线段AB的中点为M,求证,恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067f833ea6b87dba5d5c40ad6f4109a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df9dad3961893b22d6639c4311e267.png)
(1)求椭圆E的方程;
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f626795208bf4b2d14ae59b9e1fe701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9fa8c1f099f037036266801b03de8f.png)
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2019-12-27更新
|
1000次组卷
|
8卷引用:河南省郑州市2019-2020学年高三第一次质量预测理科数学试题
河南省郑州市2019-2020学年高三第一次质量预测理科数学试题(已下线)理科数学-6月大数据精选模拟卷04(新课标Ⅲ卷)(满分冲刺篇)(已下线)文科数学-6月大数据精选模拟卷04(新课标Ⅱ卷)(满分冲刺篇)(已下线)文科数学-6月大数据精选模拟卷04(新课标Ⅲ卷)(满分冲刺篇)(已下线)理科数学-6月大数据精选模拟卷04(新课标Ⅱ卷)(满分冲刺篇)安徽省合肥七中、肥西农兴中学、合肥三十二中、合肥五中2020届高三下学期冲刺高考最后一卷数学(理)试题2023年高考全国乙卷仿真卷数学(理科)试题(已下线)第五节 椭圆 第二课时 直线与椭圆的位置关系 讲
7 . 定义:平面内两个分别以原点和两坐标轴为对称中心和对称轴的椭圆E1,E2,它们的长短半轴长分别为a1,b1和a2,b2,若满足a2=a1k,b2=b1k(k∈Z,k≥2),则称E2为E1的k级相似椭圆,已知椭圆E1:
=1,E2为E1的2级相似椭圆,且焦点共轴,E1与E2的离心率之比为2:
.
(Ⅰ)求E2的方程;
(Ⅱ)已知P为E2上任意一点,过点P作E1的两条切线,切点分别为A(x1,y1)、B(x2,y2).
①证明:E1在A(x1,y1)处的切线方程为
=1;
②是否存在一定点到直线AB的距离为定值,若存在,求出该定点和定值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e0bc9ba0edc709f1978852df5a5989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
(Ⅰ)求E2的方程;
(Ⅱ)已知P为E2上任意一点,过点P作E1的两条切线,切点分别为A(x1,y1)、B(x2,y2).
①证明:E1在A(x1,y1)处的切线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b04eb41982dfe3a32467087fe1e27ba.png)
②是否存在一定点到直线AB的距离为定值,若存在,求出该定点和定值;若不存在,说明理由.
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8 . 对于双曲线
,定义
为其伴随曲线,记双曲线
的左、右顶点为
、
.
(1)当
时,记双曲线
的半焦距为
,其伴随椭圆
的半焦距为
,若
,求双曲线
的渐近线方程.
(2)若双曲线
的方程为
,弦
轴,记直线
与直线
的交点为
,求其动点
的轨迹方程.
(3)过双曲线
的左焦点
,且斜率为
的直线
与双曲线
交于
两点,求证:对任意的
,在伴随曲线
上总存在点
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99cd361ce118bca96a731b241a9c587d.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)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f3fbb597935b759aaf3a28abaf9b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1653c086d557b1845d82c2d4d8231f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)过双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4058fc45c49e6710ba7e273cb7888704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.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/88c37a37e91dd29058e66d8d905e5580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f897afce67e08b80525ce6a86cda81b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec07c400d90feb58582cfb99a1a9dc8.png)
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9 . 如图,在平面直角坐标系
中,椭圆
:
上的动点到一个焦点的最远距离与最近距离分别是
与
,
的左顶点为
与
轴平行的直线与椭圆
交于
、
两点,过
、
两点且分别与直线
、
垂直的直线相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/83ab04b6-3596-475b-b3c7-2e90bb5a5c1c.png?resizew=161)
(1)求椭圆
的标准方程;
(2)证明点
在一条定直线上运动,并求出该直线的方程;
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1422cf9ba8841ac73c00015e69f0eee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e9d47364540c8fed3ae04a63a71504.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/83ab04b6-3596-475b-b3c7-2e90bb5a5c1c.png?resizew=161)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)证明点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
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10 . 已知椭圆
的左、右焦点分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84d316b10430afac5b0c065f31e1b2c.png)
,点P为直线l:
上且不在x轴上的任意一点,直线
和
与椭圆的交点分别为A、B和C、D、O为坐标原点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4e02113f-d248-4010-b789-5d80e23bbb65.png?resizew=198)
(1)求
的周长;
(2)设直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f580ef957c42265b10f69dfd6afc295.png)
的斜线分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df20733018364ccc9d878d2d2a462129.png)
,证明:
;
(3)问直线l上是否存在点P,使得直线OA、OB、OC、OD的斜率
满足
?若存在,求出所有满足条件的点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeb11677994ba487096958b1ad82ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84d316b10430afac5b0c065f31e1b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45900deae0489e87fe448948e8091c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4e02113f-d248-4010-b789-5d80e23bbb65.png?resizew=198)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f580ef957c42265b10f69dfd6afc295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df20733018364ccc9d878d2d2a462129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8438a59f33c4ff839f697cb92d96f6.png)
(3)问直线l上是否存在点P,使得直线OA、OB、OC、OD的斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab5552081733ad5794935c7f6e1971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dba93e718deb57f1e6e8122a2bcbb0.png)
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