题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140038-64897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140038-48545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140038-49040.png)
(1)求椭圆C的方程
(2)若过点M(2,0)的引斜率为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-84773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-10943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-75641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-30330.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-40715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-32086.png)
解析
试题分析:(1)由题意知
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-68005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-12989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-45342.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-40715.png)
(2)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-45342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140041-45143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140041-60388.png)
条件
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-75641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140041-76765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140041-21388.png)
然后把
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-10943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140042-77297.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140042-95777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140042-31065.png)
最后还要根据根系关系把
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140042-62913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140039-84773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140043-53140.png)
然后代入椭圆,得到关系式
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140043-17199.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140043-61362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140043-41475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140040-32086.png)
核心考点
试题【已知椭圆C:()的短轴长为2,离心率为.(1)求椭圆C的方程(2)若过点M(2,0)的引斜率为的直线与椭圆C相交于两点G、H,设P为椭圆C上一点,且满足(O为坐】;主要考察你对椭圆的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-74802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-33031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140016-17855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-74802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140016-14716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140016-92212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-74802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140016-49213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140016-49213.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-74802.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140017-63751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140015-74802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140017-31588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140017-78069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140017-70264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140018-59921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140018-48926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140005-29719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140005-83410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140005-95568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-21806.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140005-29719.png)
(2)若过原点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-91679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-51578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-13092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-91679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140006-19506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135950-75040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135950-86425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135950-53071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135950-67761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135951-18637.jpg)
(1)求椭圆C的方程和焦点坐标;
(2)作与AB平行的直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135951-54738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135951-19037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135951-54738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135944-59799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135944-52905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135944-62193.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135932-10327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135932-59323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135933-68132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135933-40959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135933-87216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135933-38876.png)
(1)求椭圆的方程;
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023135934-22374.png)
最新试题
- 1物理推动科技进步.在美国《大众科学》杂志评出的2007年度奇思妙想十大发明中,最引人注意的是“六冲程引擎”.这种引擎在完
- 2Jenny nearly missed the flight__doing too much shopping.A.as
- 3【题文】请以“走进考场”为题,写一篇200字左右的短文。要求:适当描写场景,着重写出自己的心情。
- 4下列物质在氧气中燃烧会看到火星四射的是A.木炭B.红磷C.铁丝D.硫磺
- 5看下图,A点的经纬度正确的是: ( ) A.20ºW,20ºN
- 6有学者将国际共产主义运动在20世纪20年代之前的发展特点简要地归纳为“社会主义由空想到科学,由理论到实践,由理想到现实。
- 7阅读理解。 My name is Gary and I have one sister and a brothe
- 8阅读下面的文段,完成下面各题。上个世纪的飞雪和溪流迟子建去年深冬,在回故乡的慢行列车上,我遇见了两个老者。他们一胖一瘦,
- 9某一年的报纸上,“十四大、市场经济体制、国企改革”成为热门词眼,这一年是A.1978年B.1982年 C.1987年D.
- 10已知二次函数y=mx2+2x+m-4m2的图象经过原点,求m的值和这个二次函数的对称轴、开口方向.
热门考点
- 1声学的研究告诉我们,频率越低的声波在传播时能量损失得越慢,传播得越远.海轮上的雾号声特别低沉、庄重,有的雾号频率只有27
- 2二战后,主要资本主义国家存在的矛盾和问题有 ①阶级矛盾仍然存在 ②民族矛盾激化 ③社会危机加深 ④极右势力沉渣泛起[
- 3比-1℃低2℃的温度是______℃.(用数字填写)
- 4如图1,在y轴的正半轴上依次有点A1,A2,…,An,…,A1,A2的坐标分别为(0,1),(0,10),且(n=2,3
- 5下列情景涉及到的物理知识,描述正确的是: [ ]A.静止在水平桌面上的课本对桌面的压力和桌面对它的支持力是一对平
- 6若2x2-3x+1=0,则代数式4x2-6x+2010的值是( )A.2008B.2009C.2010D.2011
- 7面对人与人之间的差异,我们应采取的正确态度是什么?___________________________________
- 8They must have been enjoying themselves there,otherwise they
- 9标志我国世袭制代替禅让制的事件是A.禹传位给伯益B.尧传位给舜C.舜传位给禹D.禹传子,家天下
- 10根据右图判断,下列说法错误的是( )A.NaCl和NH4Cl的溶解度都随温度升高而增大B.20℃时,20克NaCl加入