题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172509-69769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172509-82957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172509-75139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172509-59600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-79584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-71504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-97250.png)
(Ⅰ) 求椭圆的方程;
(Ⅱ) 若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-34057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172511-21255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172511-74915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-97250.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172511-72547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172511-77562.png)
又离心率
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172512-75167.png)
故椭圆方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172512-94983.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172512-27210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172512-73341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172512-19202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172511-74915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-95737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-81085.png)
易知当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-57340.png)
联立
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-32568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-34057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-70372.png)
于是
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172513-57497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172514-73170.png)
由①③得,
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172514-21395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172514-45377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172514-21761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172515-23711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172510-94980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172515-28148.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172504-18932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172504-24227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172504-50366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172504-45781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172458-42480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172458-25050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172459-64533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172459-94741.png)
A.12 | B.9 | C.8 | D.10 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172452-88618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172453-28233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172446-77557.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172425-74270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172425-55736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172425-12656.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172425-32604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-45838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-80742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-36848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-43667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-56744.png)
1. 设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172426-36848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-72182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-56957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-26722.png)
2. 是否存在常数
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-18564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-61363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172427-18564.png)
3.
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023172428-13354.png)
最新试题
- 1氨分子中不存在 [ ]A.共价键 B.离子键 C.极性键 D.共用电子对
- 2在中国,佛教是外来文化,在我国的许多著名寺庙中,儒、释、道三种宗教的外在特征可供奉于一殿、一庭、一山之中。这说明A.中华
- 3 设随机变量服从二项分布,且则n,p的值分别为A.B.C.D.
- 4张大娘最近经常头昏,她的血压是19千帕/14千帕。张大娘可能患有( )A.高血压B.低血压C.贫血D.脑炎
- 5—What made him so worried.— his wallet.A.Having lostB.
- 6实践探究题(10分)某校学生会打算开展“创诚信校园,做诚实学生”活动,决定先在同学们中进行诚信状况调查。若你是这次活动的
- 7_________ in the fields on a March afternoon, he could feel
- 8— Sorry, I have to _____ now. It"s time for class. — OK, I"l
- 9测得CO和CO2两种气体组成的混合物中含碳量为30%(质量分数),则在混合物中CO和CO2的质量比为( )A.33:7
- 10根据下图及描述,回答下列问题:(1)关闭图A装置中的止水夹a后,从长颈漏斗向试管中注入一定量的水,静置后如图所示.试判断
热门考点
- 1两条直线,分别过点,(为常数),且分别绕,旋转,它们分别交轴于,(,为参数),若,求两直线交点的轨迹方程.
- 2如图所示的是我国传统游戏项目打陀螺。在陀螺的底部装有光滑的小钢珠,这是为了____________; 玩的时候,将鞭子绕
- 3When _____ her father would come soon, she had an _____ look
- 4Before selecting the curtain for your newly-decorated house,
- 5原来做匀速运动的升降机内,一被伸长的弹簧拉住的物体A静止在地板上,如图所示,现发现A突然被弹簧拉向右方,由此可判断,此时
- 6一个口袋内有10个标有1~10号的小球,它们的形状大小完全相同.从中任意摸取1球,则摸到球号是偶数的概率是______.
- 7魏源编著的《海国图志》,系统的介绍了世界各国地理、历史和科技发展状况,提出了______________的主张。
- 8下面属于急救措施的是( )A.人工呼吸B.胸外心脏挤压C.出血和止血D.以上都是
- 9如图是质谱仪的工作原理示意图,带电粒子被加速电场加速后,进入速度选择器.速度选择器内互相垂直的匀强磁场和匀强电场的强度分
- 10①~⑤五种元素在元素周期表中的位置如图所示:回答下列问题:(1)①~⑤五种元素中,非金属性最强的元素在周期表中的位置是_