题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140251-54972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140251-79617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140251-60935.jpg)
(1)当l1与l2夹角为60°,双曲线的焦距为4时,求椭圆C的方程;
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-64138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-36408.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-69076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-50017.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-33757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-33757.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-33757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-13859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-88058.png)
故椭圆C的方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-69076.png)
(2)由已知l:y=
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-54670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140253-33757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140254-49175.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-64138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-36408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140254-68048.png)
将A点坐标代入椭圆方程,得(c2+λa2)2+λ2a4=(1+λ)2a2c2.∴(e2+λ)2+λ2=e2(1+λ)2.
∴λ2=
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140254-89913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-50017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140252-50017.png)
核心考点
试题【已知椭圆C的方程为=1(a>b>0),双曲线=1的两条渐近线为l1、l2,过椭圆C的右焦点F作直线l,使l⊥l1.又l与l2交于P点,设l与椭圆C的】;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/20191023/20191023140240-54346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140240-18839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140241-61872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140241-61872.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140240-18839.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140241-95112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140241-36148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140242-48865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140241-61872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140240-18839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140242-27753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140242-88468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140225-56992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140225-55538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140225-33630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140225-93459.png)
(1)求C的方程;
(2)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140226-80574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140226-59695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140226-28148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140226-16626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140227-18859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140215-51622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140215-95781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140216-40470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140216-41552.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140215-51622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140216-63390.png)
(2)在
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140215-51622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140216-91671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140217-29162.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140215-51622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140217-52690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140216-91671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140217-78215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140217-66846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140217-66846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140209-66270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140209-88648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140210-26784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140210-95664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140210-11748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140210-66516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140211-30702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140211-29685.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-55068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-97463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-12814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-94058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-55068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-55068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-99340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-87752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-70199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-68030.jpg)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-55068.png)
(2)点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-60594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140155-55068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-60594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-66060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-20131.png)
(ⅰ)当点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-60594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-29006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140156-66060.png)
并证明
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140157-73727.png)
(ⅱ)求证:线段
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023140157-53912.png)
最新试题
- 1下列不是节肢动物的是[ ]A.蜜蜂B.螳螂 C.麻雀 D.蜻蜓
- 2用3节干电池作电源的电筒,小灯泡发光时的电阻是10Ω,流过灯丝的电流是 。
- 3某行星绕太阳运动可近似看作匀速圆周运动,已知行星运动的轨道半径为R,周期为T,万有引力恒量为G,则该行星的线速度v大小为
- 4如图所示,物体A 重5N ,物体B 重10 N ,现对A 施加一水平力F 为100 N ,将A 、B 压在竖直墙壁上静止
- 5阅读下面文字,按要求回答问题。 这些年轻人,从一个地方到另一个地方,离开一种风景奔赴另一种风景,放弃一种生活选择另一种
- 6[2012·江苏卷] 用下列实验装置进行相应实验,能达到实验目的的是( ) A.用图(a)所示装置除去Cl2中含有的
- 7已知命题p:x∈R,x2+2ax+a≤0.若命题p是假命题,则实数a的取值范围是( ).
- 8自行车生产厂家对自行车钢圈和钢丝及龙头、车架、链条等部位采用了哪些防锈方法?______.
- 9下列物质属于纯净物的是 [ ]A.医用酒精 B.干冰 C.清新空气 D.加碘食盐
- 10春夏季节,菜园里常见白色的、黄色的菜粉蝶翩翩起舞.菜粉蝶的发育过程是( )A.卵→蛹→幼虫→成虫B.卵→若虫→成虫C.
热门考点
- 1根据上文内容判断正误,正用“T”表示,误用“F”表示。 Everybody has a home. We pe
- 2水是维持生命的最基本条件,以下有关水的说法错误的是 [ ]A.自由水在人体内是良好的溶剂 B.衰老的细胞水分减少
- 3【题文】下列各句中,没有语病的一句是 (3分) A.10月29日下午,中共中央******在主持学习会议时强调
- 4在做《验证力的平行四边形定则》实验时,橡皮条的一端固定在木板上,用两个弹簧秤把橡皮条的另一端拉到某一确定的O点,以下操作
- 5 请以“陪伴”为题,写一篇文章。 要求:①可以写自己的经历,也可以写别人的事,但不得出现真实的人名、校名。②除诗歌外
- 6小明同学在打扫卫生时不小心在教室里正在播放的彩电屏幕上留下几个水滴,正在紧张之时,小明忽然透过水滴看到了红、______
- 7∠1和∠2互补,且∠1=65 °,则∠2=( )°.
- 8神州七号载人飞船在太空真空状态下飞行,要求飞船的舱门必须具有良好的密封性,以确保航天员的生命安全。为此,要在发射前检验飞
- 9—____ my dictionary anywhere? —Yes. I saw it on your desk a
- 10实验基本操作是学习化学的灵魂。以下实验操作中正确的是A.倾倒液体B.浓硫酸的稀释C.干燥氧气D.测定某溶液的pH