题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-92497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-13021.png)
(1)求椭圆C的方程;
(2)已知直线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-68400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-97126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-99223.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-66128.png)
解析
试题分析:(1)要求椭圆的方程需要找到关于
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-29320.png)
(2)由线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-68400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-97126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-99223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-74378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-24488.png)
试题解析:(1)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-92497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221756-19530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221756-74241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221756-27475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221756-49710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-66128.png)
(2)把直线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221754-68400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221757-62048.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221757-57107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221757-76200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221757-13317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-99223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221757-39780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221758-67614.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221758-47487.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221758-51626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221758-24280.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221755-99223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221759-10551.png)
核心考点
试题【已知椭圆的离心率为,椭圆的的一个顶点和两个焦点构成的三角形的面积为4,(1)求椭圆C的方程;(2)已知直线与椭圆C交于A, B两点,若点M(, 0),求证为定值】;主要考察你对曲线与方程的应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221751-67562.png)
A.5 | B.6 | C.7 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221740-70727.png)
(1)求椭圆C的方程;
(2)过右焦点
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221740-30320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221741-86041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221741-55177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221741-86041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221734-16269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221734-35390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221734-88094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221735-85068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221735-67668.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221728-45794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221728-84056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221729-58419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221729-58419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221729-22198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221729-71146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221729-30699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221718-22503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221718-77211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221718-79713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221718-63010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221719-94815.jpg)
(1)求椭圆C的方程;
(2)求点P的坐标;
(3)设M是直角三角PAF的外接圆圆心,求椭圆C上的点到点M的距离
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025221719-89410.png)
最新试题
- 1232. A grander National Day will be observed on Tiananmen Sq
- 2世界博览会被誉为“经济、科技与文化界的奥林匹克盛会”阅读下列材料,结合所学知识回答问题。材料一 1851年伦敦举办第一
- 3下列各项中加粗字的读音全都相同的一项是[ ]A.修禊 楔子 抓住契机 锲而不舍 B.喘息 瑞气 清流激湍 惴惴不
- 4下列各组物质既有离键又共价键的A.KOH、H2SO4、NH4ClB.CaO、Na2CO3、NH4HCO3C.K2O2、N
- 5将浸泡后的大豆种子剥去种皮,并做如图所示的处理,在适宜种子萌发的外界条件下培养,其中肯定不会萌发的是( )A.完整的子
- 6若分式的值为正整数,则整数x的值为 [ ]A.0B.1C.0或1D.0或-1
- 7下列关于西瓜皮和西瓜瓤的生物学描述,比较正确的应该是( )A.营养器官和生殖器官B.营养组织和保护组织C.生殖器官和营
- 8关于我国人口分布的叙述,正确的是( )A.西南多,东北少B.西北多,西南少C.东南多,西北少D.西北多,东南少
- 9除了平面镜外生活中也常用到凹面镜,下图是一束平行光射到凹面镜上的传播情况.(1)由图中光路可知,凹面镜对光线起到____
- 10化学就在我们身边,生活中处处有化学.(1)体温表中的水银不是银,应该是______(写元素名称).(2)CaO是常用的食
热门考点
- 1(1)已知z的共轭复数是.z,且z•.z-3i•z=101-3i,求z.(2)已知z是虚数,求证:z+1z为实数的充要条
- 2Many Chinese universities provide scholarships for students
- 3制售假冒伪劣商品在国际上被公认为“仅次于毒品的第二大公害”。为此,近年来我国不断整顿和规范市场经济秩序,在全国范围展开声
- 4有一些鱼类有趋光性,渔民常利用灯光引诱这些鱼类。鱼类的趋光性是一种什么行为? [ ]A.先天性行为 B.后天性
- 5下列各句中划线的成语使用正确的一项是( )A.席间杨六通意气风发,纵论时势,谈锋之健,无人可及,充分展示了他的纵横捭
- 6下列说法不正确的是:A.尊重地球就是尊重生命,拯救地球就是拯救人类自身B.青春期是人生的转折期C.人活着就应享受自己的生
- 7下列做法符合安全用电的是[ ] A.使用测电笔时,手要接触笔尾的金属体 B.家庭电路中保险丝可用铜丝代替 C.家
- 8(15分)近代社会的民主思想与实践材料:方今中华诚非雄强,然百姓尚能自安其业者,由朝廷之法维系之也。使民权之说一倡,愚民
- 91.已知集合,则( )A.{1,6}B.{4,5}C.{2,3,7}D.{2,3,4,5,7}
- 10He doesn’t know _________ English because he has studied it