题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-75340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-65725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-39050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-39050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-71814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013007-59933.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-55381.png)
(2)点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-46758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-59660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-38974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-96616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013009-56340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013008-55381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013009-90393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013009-96111.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013009-43232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013010-91990.png)
解析
试题分析:(1)由题意可知:a+c=
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013010-19469.png)
∴a=
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013010-80479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013010-28814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013009-43232.png)
(2)设直线l的方程为:y=k(x-1)A(x1,y1) ,B(x2,y2),M(
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013011-60881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013011-10462.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013011-77225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013011-10239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013011-43597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013012-90839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013012-54866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013012-29026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013012-91997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026013013-89926.png)
点评:直线与椭圆相交,常用到韦达定理使计算简化,圆锥曲线中的向量运算常转化为点的坐标运算,本题有一定难度
核心考点
试题【(本小题满分13分)已知点分别为椭圆的左、右焦点,点为椭圆上任意一点,到焦点的距离的最大值为.(1)求椭圆的方程。(2)点的坐标为,过点且斜率为的直线与椭圆相交】;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/20191026/20191026013002-90365.png)
则它的离心率为( )
A.2 | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012955-84969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012956-46091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012956-18277.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012944-71273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-19702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-58052.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-14307.png)
(II)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-20731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-46968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-14307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-88995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012945-98723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-47371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012930-75351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012930-72630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012930-21051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012930-46334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012930-28759.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
(Ⅱ)点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-65093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-65093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-57368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-57368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012929-79323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-57368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-79190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012931-31743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012924-92331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012924-58254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012924-36053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026012924-31551.png)
A.![]() | B.![]() | C.![]() | D.![]() |
最新试题
- 1如图分别表示匀强磁场的磁感应强度B、闭合电路中一部分直导线的运动速度v和电路中产生的感应电流I的相互关系,其中正确是(
- 2下列词语中加粗字读音完全正确的一项是[ ]A.巢穴(xué)庇护(bì)笨拙(zhuó)脍炙人口(huì)B.哄
- 3Marco, ____, was amazed by how beautiful and powerful China
- 41949年后,中国积极主动的融人世界。将下列重大外交事件按时间排列,正确的是 ①重返联合国 ②中美关系正常化
- 5Look, what Father _____ me when he came home from work!A.too
- 6A、B、C、D、E、F、G、H八种前四周期元素,原子序数依次增大,化合物甲由A、D、E三种元素组成,常温下0.1mol/
- 7张老师在一次“探究性学习”课中,设计了如下表:n2345…a22-132-142-152-1…b46810…c22+13
- 8不定项选择研究平抛运动,下面哪些做法可以减小实验误差( )A.使用密度大、体积小的钢球B.实验时,让小球每次都从同一
- 9下列分子具有正四面体结构的是 [ ]A.B.C.D.
- 102010年一季度全国企业家信心指数和企业景气指数分别比上季度提高了7.8点和2.3点。企业景气指数和企业信心指数的好转是
热门考点
- 1如图所示,是由几个小立方块搭成的几何体(小正方体内的数字表示小立方块的个数),请从图中选出 正确的主视图和左视图 [
- 2根据意思写出词语。(1)美好的程度差不多。( )(2)忠实地信仰。( )(3)比喻眼光短,见识浅。( )(4)互相
- 3(本题共两小题,每小题6分,满分12分)(1)计算:(2)解分式方程:
- 4在下列健康人的4种液体样本中,能与双缩脲试剂发生紫色反应的是①尿液 ②胃液 ③汗液 ④唾液[ ]A.①③B.①④
- 5下列词语中划线字的读音,全都正确的一项是( )A.付梓(xīng)矜育(jīn)拱券(quàn)决起而飞(xuè
- 6“秦王扫六合,虎视何雄哉!挥剑决浮云,诸侯尽西来。”这是诗人李白对哪位皇帝的描述[ ]A.秦始皇B.汉高祖C.唐
- 7亚洲各分区中,人口数量超过1亿的国家数量最多的地区是[ ]A.东亚B.西亚C.东南亚D.南亚
- 8计算眼镜度数的公式是D=100f(f的单位m),某同学将一凸透镜放在太阳光下,让太阳光垂直镜面照射,调节透镜与地面间的距
- 9如图,直线,点坐标为(1,0),过点作轴的垂线交直线于点B,以原点O为圆心,长为半径画弧交轴于点;再过点作的垂线交直线于
- 10观察下面四幅建筑物图片,关于建筑物③所在国家的叙述,不正确的是[ ]A.被称为“骑在羊背上”的国家 B.属于发展