解题方法
1 . 已知椭圆
的焦点在
轴上,它的一个顶点恰好是抛物线
的焦点,离心率
.
(1)求椭圆的标准方程;
(2)过椭圆
的右焦点
作直线
交椭圆
于
两点,交
轴于点
,若
,那么
为定值吗?证明你的结论.
![](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/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5bb267505c2a5fc6f9abc02bd43120.png)
(1)求椭圆的标准方程;
(2)过椭圆
![](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/0f85fca60a11e1af2bf50138d0e3fe62.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad150fcb95a93b39a16af8cced105f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
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2 . 已知F为椭圆
的左焦点.设P是椭圆C的右准线上一点,过点P作椭圆O的两条切线
,切点分别为A,B,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53074dccec1c5d95c57e49a2fbfc1f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
A.![]() ![]() | B.![]() |
C.![]() | D.![]() |
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3 . 已知椭圆
的焦距和半长轴长都为2.过椭圆C的右焦点F作斜率为
的直线l与椭圆C相交于P,Q两点.
(1)求椭圆C的方程;
(2)设点A是椭圆C的左顶点,直线AP,AQ分别与直线
相交于点M,N.求证:以MN为直径的圆恒过点F.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
(1)求椭圆C的方程;
(2)设点A是椭圆C的左顶点,直线AP,AQ分别与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
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17-18高二·全国·课后作业
名校
解题方法
4 . 在平面直角坐标系中,过点
的直线
与椭圆
交于
、
两点,点
是线段
的中点.设直线
的斜率为
,直线
的斜率为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515fa8da69a5869ac21b6c19f8a8b00b.png)
__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/accf35598ee054f1bf8b6584641d6d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a949c00526fddf435423272cf10f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2fd6df03fd6e945e2c1cb44bca014b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515fa8da69a5869ac21b6c19f8a8b00b.png)
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2023-02-03更新
|
421次组卷
|
8卷引用:活页作业21 圆锥曲线的共 同特征 直线与圆锥曲线的交点-2018年数学同步优化指导(北师大版选修2-1)
(已下线)活页作业21 圆锥曲线的共 同特征 直线与圆锥曲线的交点-2018年数学同步优化指导(北师大版选修2-1)(已下线)3.1.2 椭圆(第二课时)(精讲)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第一册(人教A版)(已下线)3.1.2 椭圆(第二课时)(精练)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第一册(人教A版)(已下线)专题41椭圆-2022年(新高考)数学高频考点+重点题型上海外国语大学附属外国语学校2022届高三上学期期中数学试题人教B版(2019) 选修第一册 北京名校同步练习册 第二章 平面解析几何初步 本章测试(已下线)第五篇 向量与几何 专题4 极点与极线 微点3 极点与极线问题常见模型总结(一)(已下线)专题02 圆锥曲线中的求值问题(三大题型)
解题方法
5 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
的右焦点为
,O为坐标原点,短轴是长轴长的
.
(1)求椭圆C的标准方程;
(2)点
为椭圆C长轴上的一个动点,过点P且斜率为
的直线l交椭圆C于A,B两点;求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14436636ec6a7aec09cb63cecf6e970d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(1)求椭圆C的标准方程;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a430c41f782c5c12f68a49c5d0cb1ee2.png)
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6 . 已知曲线
上的任意一点到两定点
的距离之和为
.直线
交曲线
于
两点,
为坐标原点..
(1)求曲线
的方程;
(2)若
不过点
且不平行于坐标轴,记线段
的中点为
.求证:直线
的斜率与
的斜率的乘积为定值;
(3)若以线段
为直径的圆过点
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5439f5ff9bd5deec0f0ef35c6f605b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)若以线段
![](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/866b81a8384cce4f24867baca2e6820c.png)
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2022-12-05更新
|
408次组卷
|
2卷引用:上海市格致中学2020-2021学年高二上学期12月月考数学试题
7 . 已知椭圆
(常数
)的左顶点为
,点
,
为坐标原点.
(1)若
是椭圆
上任意一点,
,求
的值;
(2)若
是椭圆
上任意一点,
,求
的取值范围;
(3)设
是椭圆
上的两个动点,满足
,试探究
的面积是否为定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3044df061f3c9b06e525722cca969a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b06046947fc7737b7159e968065d0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385495ec3ecd33e95b9b671ccc2866b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c918ca5d4e6d46ed130f85e5fa608d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ab4019fb59a5d6bfb7d210c4637466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fdf1d541630bd7c2973fc327514e43.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7d5b7a335fb30a034976287aee9e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392d00243d81bf17ff3be81e7a7ee05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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2022-12-05更新
|
217次组卷
|
3卷引用:上海市行知中学2020-2021学年高二上学期12月月考数学试题
真题
解题方法
8 . 如图,以椭圆
的中心O为圆心,分别以a和b为半径作大圆和小圆.过椭圆右焦点
作垂直于x轴的直线交大圆于第一象限内的点A.连结
交小圆于点B.设直线
是小圆的切线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/de47bcec-2815-4e0e-9a2b-92ce47ec6e1c.png?resizew=190)
(1)证明
,并求直线
与y轴的交点M的坐标;
(2)设直线
交椭圆于P、Q两点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a9a660910d4efa74ccdcf120273993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/de47bcec-2815-4e0e-9a2b-92ce47ec6e1c.png?resizew=190)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502491f4e48e1d74ca8cc709840c30b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e194a24c02cf7c0b8a92b56731188f6.png)
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2022高三·全国·专题练习
真题
解题方法
9 . 如图,中心在原点O的椭圆的右焦点为
,右准线l的方程为:
.
![](https://img.xkw.com/dksih/QBM/2022/10/8/3083513253748736/3083907999703040/STEM/e7b5917b930944f1825aef6f6af44bc0.png?resizew=255)
(1)求椭圆的方程;
(2)在椭圆上任取三个不同点
,使
,证明:
为定值,并求此定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7b07ace87ed58fdc1f1bc78a04aeda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5072bef93b6845e3332a2b212e32b46.png)
![](https://img.xkw.com/dksih/QBM/2022/10/8/3083513253748736/3083907999703040/STEM/e7b5917b930944f1825aef6f6af44bc0.png?resizew=255)
(1)求椭圆的方程;
(2)在椭圆上任取三个不同点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7807638578edd712265463a7a5eab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef451b1e15bc2c490e4beee7ed71b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6baa2fab5b41da5c141f42ba8a4cc225.png)
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10 . 已知
,B在圆
上运动,过
的中点M向y轴引垂线,垂足为N,且
,设
,点P的轨迹为曲线
.
(1)求曲线
的方程,并证明直线
与
的斜率之积为定值;
(2)设E,F是曲线
上的不同两点,O为坐标原点,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40630a669f4eedf626bc24851df10c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8ebed1c19f199dc9165162dc5d3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f3da46e58716b14ac1f8eb493fb9667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531b86323f50ea2b30aa5e033d1d396c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2)设E,F是曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb55ed7f3fff3660eecdbe5ab87a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
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