题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134154-57300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134154-54157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134154-59162.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-61789.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-63590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-31149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-53247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-24143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134156-65335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134156-97169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134156-51082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134156-27893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-80389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-54768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-63340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-64181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-51962.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-68415.png)
解析
试题分析:(1)由直线和圆相切,求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-23685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-38076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-81998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-55886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-61789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-64181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-51962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-54768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-63340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-97487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-91287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-54768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-63340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-64181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-51962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134200-16909.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134200-75581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134200-21453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134200-36627.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-91287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134200-70569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134201-88193.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134201-16281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134201-27869.png)
故可设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134159-97487.png)
将其与椭圆方程联立,消去
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134155-53247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134201-42351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134202-65444.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134202-79659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134202-95941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134202-86593.png)
同理可得
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134203-32906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134203-20085.png)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134203-51929.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134203-30076.png)
故直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134157-64181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134158-51962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134204-61168.png)
核心考点
试题【已知椭圆的离心率为,以原点为圆心、椭圆的短半轴长为半径的圆与直线相切.(1)求椭圆的方程;(2)设,过点作与轴不重合的直线交椭圆于、两点,连结、分别交直线于、两】;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/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-26468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-22775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-52964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-54441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-57838.jpg)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-17011.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-52964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-73989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-19010.png)
(3)点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134140-31052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134139-20475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134141-86713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134141-11166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134141-11166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134141-86713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134114-72826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134114-85505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134115-56651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134115-78312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134115-83444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134115-47164.jpg)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-31958.png)
(2)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-30264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-31817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-31958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-91378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-77824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134117-64920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134117-66377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134117-93691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134116-31817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134117-66377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134109-17524.png)
为坐标原点)为圆心、|OF1|为半径的圆与该椭圆左半部分的两个交点,且△F2AB是正三角形,则此椭圆的离心率为( )
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134109-85902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134109-98886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134109-63384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134110-51979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134058-88059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134059-45592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134058-88059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134058-88059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134045-19808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134045-46599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134045-25591.png)
(1)求焦点F2的轨迹
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134046-50704.png)
(2)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134046-13627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023134046-50704.png)
最新试题
- 1如图所示,甲、乙两幅图反映的共同物理规律是______;图乙演示的实验中,看到的像是倒立的______(选填“虚”或“实
- 2阅读理解。
- 3甲乙两船在同一条河流中同时开始渡河,河宽为H,河水流速为u,划船速度均为v,出发时两船相距233H,甲乙两船的船头均与河
- 4读“地震波波速与地球内部构造图”,回答问题。小题1:图中①表示( )A.地幔B.地壳C.地核D.软流层小题2:岩石圈位
- 5马克思在《共产党宣言》中指出“资本具有天生的特殊的世界主义性质”,“资本在全球范围内的自由流动”挖掉了古老民族工业的基础
- 6下列关于自由落体运动的说法正确的是( )A.在真空条件下,石头将比纸片先落地B.自由落体运动是初速度为0,加速度大小为g
- 7若NA表示阿伏加德罗常数,下列说法中错误的是 A.0.1mol/L稀硫酸中含有硫酸根离子个数为0.1NAB.32g O2
- 8[2014·南通调研]设α,β是空间内两个不同的平面,m,n是平面α及β外的两条不同直线.从“①m⊥n;②α⊥β;③n⊥
- 9 人生像一只急速旋转的陀螺,或许一生都在辛苦忙碌奔波中度过;人生更像一条没有尽头的轨道,只须你像车轮一样飞速的奔跑,每
- 10“我的附庸的附庸,不是我的附庸。”这句谚语反映了西欧[ ]A、西欧奴隶制度的等级关系B、西欧资本主义制度的等级关
热门考点
- 1在曲线处的切线方程为 。
- 2有一家共五口人,其中三人的皮肤很粗糙,并且一到夜晚就看不清物体。他们的食物中可能缺少 [ ]A.维生素A B.维
- 3阅读下列短文,根据短文中的信息完成文后表格。(每空一词)Dear Nancy, I am happy to tell y
- 4甲、乙两物体所受的重力之比为1:2,甲,乙两物体所在的位置高度之比为2:l,它们各自做自由落体运动,则( )A.落地时
- 5书面表达。 下面一组图画描述的是上个星期天发生在宁波雅戈尔动物园里的一个故事,请你用第一人称写一篇英语日记。 注
- 6如图,已知∠BOC=2∠AOB,OD平分∠AOC,∠BOD=14°,求∠AOB的度数。
- 7河姆渡遗址博物馆是以河姆渡遗址为依托建立起来的遗址性的专题博物馆。于1993 年5 月落成开放,由***江泽民题写馆名
- 8下列物质既能与盐酸反应又能与NaOH溶液反应的是( )A.Na2CO3B.KHCO3 C.Al2O3D.NaHSO4
- 9在一块长为8、宽为的矩形中,恰好截出三块形状相同、大小不等的直角三角形,且三角形的顶点都在矩形的边上,其中面积最小的直角
- 10NO2在413K以下能聚合成无色的抗磁性气体N2O4,N2O4曾被用作第一艘登月飞船的液体推进系统中的氧化剂,下列有关说