名校
1 . 如图,在平面直角坐标系xOy中,已知椭圆
的离心率为
,右焦点到直线
的距离为1.
![](https://img.xkw.com/dksih/QBM/2019/12/31/2367237573689344/2367715206365184/STEM/c683e78aed2c4bacb6bc21220374daab.png?resizew=213)
求椭圆的标准方程;
若P为椭圆上的一点
点P不在y轴上
,过点O作OP的垂线交直线
于点Q,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78c38805c09dcfbcc42103308975a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b19458962722f1e812d5c5006740d0c.png)
![](https://img.xkw.com/dksih/QBM/2019/12/31/2367237573689344/2367715206365184/STEM/c683e78aed2c4bacb6bc21220374daab.png?resizew=213)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6bebad2e831ff4930b1f221d1abf57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae50d614a8afd23b30069c46f78787a3.png)
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2020-01-01更新
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2卷引用:宁夏中卫市2021届高三第二次优秀生联考数学(文)试题
2 . 如图,椭圆
:
的左、右焦点分别为
,椭圆
上一点
与两焦点构成的三角形的周长为6,离心率为
,
(Ⅰ)求椭圆
的方程;
(Ⅱ)过点
的直线
交椭圆
于
两点,问在
轴上是否存在定点
,使得
为定值?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.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/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084545104412672/null/STEM/f3e024ee556444ffa5396da7f7a605e9.png?resizew=181)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392d61933568d27a27568c6298365bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e8290efebfff80d355471c7bb06058.png)
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2018-12-02更新
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6卷引用:2020届宁夏中卫市高三下学期第二次模拟考试数学(文)试题
名校
3 . 已知椭圆C的中心在坐标原点,焦点在x轴上,左顶点为A,左焦点为
,点
在椭圆C上,直线
与椭圆C交于E,F两点,直线AE,AF分别与y轴交于点M,N
Ⅰ
求椭圆C的方程;
Ⅱ
在x轴上是否存在点P,使得无论非零实数k怎样变化,总有
为直角?若存在,求出点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2a3a20f2715f640eab19553ee20395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57263eb46061de34df3c52814cfc1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c42d7b8e1d3221fc8b8074c9a090270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba441131061f773ab758b740dae3ad9f.png)
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2016-12-04更新
|
1243次组卷
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4卷引用:【市级联考】宁夏中卫市2019届高三下学期第一次模拟考试数学(文)试题
2012·福建福州·一模
名校
4 . 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)
您最近一年使用:0次
2016-12-01更新
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21卷引用:2017届宁夏中卫市高三第二次模拟考试数学(文)试卷
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