1 . 已知椭圆
:
过点
,过右焦点
作
轴的垂线交椭圆于M,N两点,且
.
(1)求椭圆
的方程;
(2)点P,Q在椭圆
上,且
,
,D为垂足.证明:存在定点
,使得
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512fb5338ab8fb9def37bbb4dd5592d7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点P,Q在椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c42f1a6facd7d4056aedb03fc9ce2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b182ff664d8ed9d0c518dbbf98ef10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97819c1a707d1a4555600b0282eb0555.png)
您最近一年使用:0次
2022-05-10更新
|
460次组卷
|
3卷引用:山西省晋中市2022届高三下学期5月模拟数学(理科)试题
名校
解题方法
2 . 已知椭圆
:
过点
,过右焦点
作
轴的垂线交椭圆于
,
两点,且
.
(1)求椭圆
的标准方程;
(2)点
,
在椭圆
上,且
.证明:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512fb5338ab8fb9def37bbb4dd5592d7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/05c42f1a6facd7d4056aedb03fc9ce2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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2022-05-09更新
|
615次组卷
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5卷引用:山西省晋中市2022届高三下学期5月模拟数学(文)试题
山西省晋中市2022届高三下学期5月模拟数学(文)试题山西省怀仁市第一中学校2022届高三下学期第四次模拟数学(文)试题(已下线)2022年全国高考乙卷数学(文)试题变式题13-16题(已下线)2022年全国高考乙卷数学(文)试题变式题21-23题(已下线)模型6 非对称结构和齐次化处理问题模型
3 . 在平面直角坐标系
中,
分别是椭圆
的左焦点和下顶点,点
在椭圆
上.
(1)求椭圆
的方程及点
的坐标;
(2)椭圆
上是否存在两点
,使得
的三条高线交于点
.若存在,求出此时
所在直线的方程,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56bfbaabe3fa71658b68fe4a7f1ca5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ed4df19d2b50186d02c8b9d3e86a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5fc458474302709d3ce5c417f40e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56bfbaabe3fa71658b68fe4a7f1ca5c.png)
(2)椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
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2021-05-11更新
|
328次组卷
|
3卷引用:山西省晋中市2021届高三三模数学(文)试题
山西省晋中市2021届高三三模数学(文)试题山西省晋中市2021届高三三模数学(理)试题(已下线)第4讲 圆锥曲线中的最值、范围、存在性问题(练)-2022年高考数学二轮复习讲练测(新教材·新高考地区专用)
2011·山西晋中·一模
4 . 如图,已知坐标平面内,M、N是x轴上关于原点O对称的两点,P是上半平面内一点,△PMN的面积为
点
坐标为
,
(
为常数),![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70ab68baa410038ce0aefa6c23abc6f.png)
![](https://img.xkw.com/dksih/QBM/2011/5/19/1570210531041280/1570210536407040/STEM/645c60cd-3e79-415f-84e7-1fe03988f2d8.png?resizew=179)
(1)求以M、N为焦点且过点P的椭圆方程;
(2)过点
的直线l交椭圆于C、D两点,交直线
于点E,点B、E分
的比分别为
、
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09619c291b05a71d8e7465f73920faf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0cd09f6da00c8e8422f954a8c02a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7777a053967e507183de00be07e7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70ab68baa410038ce0aefa6c23abc6f.png)
![](https://img.xkw.com/dksih/QBM/2011/5/19/1570210531041280/1570210536407040/STEM/645c60cd-3e79-415f-84e7-1fe03988f2d8.png?resizew=179)
(1)求以M、N为焦点且过点P的椭圆方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e30645f36e8628b9e25d53598d5174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5dc876d7dcd3c971b36d26668b1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
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