题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-44815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-50614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-86574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-91404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-32408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-34169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-44815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-26180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-60265.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-44815.png)
(2)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-77194.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-14774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-20185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-62403.png)
解析
试题分析:(1)∵一个长轴端点为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-86574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-86807.png)
因为短轴端点和焦点所组成的四边形为正方形,所以
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-45947.png)
又因为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-28491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-79187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-14774.png)
(2)(1)当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004307-91404.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-71373.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-21663.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004310-46451.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004310-85651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-34169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004310-35003.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004310-27724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004310-23221.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004311-56066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004311-48866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004311-85644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004311-84104.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004312-22190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004312-45796.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004312-59970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004312-83444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004308-20185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004309-62403.png)
点评:求解直线与圆锥曲线的位置关系时,免不了要联立直线方程和圆锥曲线方程,此时一般运算量比较大,综合考查学生分析问题、解决问题的能力和运算求解能力.
核心考点
试题【已知椭圆的中心为坐标原点,一个长轴端点为,短轴端点和焦点所组成的四边形为正方形,若直线与轴交于点,与椭圆交于不同的两点,且。(14分)(1)求椭圆的方程;(2)】;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/20191026/20191026004301-56608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004257-77517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004257-57037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004247-33696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004247-48674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004247-48674.png)
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004234-21541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004234-72117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004234-97297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004234-39260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-96415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-83608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-68688.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-34368.png)
(Ⅱ)设过点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-69475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-69885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004235-34368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004236-42901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004236-97365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004236-42770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004236-85979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004237-49096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004237-99393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004236-85979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004226-85711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004226-34291.png)
A.y2=—
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004226-56293.png)
B.y2=9x
C.y2=
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004226-18592.png)
D. y2=3x
最新试题
- 1阅读下面的文言文,完成后面问题。杨巍,字伯谦,海丰人。嘉靖二十六年进士。除武进知县。擢兵科给事中。操江佥都御史史褒善已迁
- 2下面列举的现象中,由于做功使物体的内能减少的是A.酒精涂在手背上觉得凉B.把铁钉钉进墙里,铁钉变热C.烧水时冲动壶盖的水
- 3My teacher asked me if I was worried about the test and I sa
- 4下列含氧化合物不需要加热,也可以直接产生O2的是 [ ]A.KClO3B.MnO2C.H2O2D.Fe3O4
- 5下面的句子里没有语病的一项是( )(3分)A.为了防止学生溺水悲剧不再发生,学校加强了安全的教育和管理。B.
- 6如图所示,一个人站在地上想利用滑轮组将重物匀速提起来.要想使人所用的拉力最小,请在图上画出滑轮组上绳子的绕法.
- 7一定时期,流通中实际需要的货币量为3 000亿元,纸币的发行量为6 000亿元,则1元纸币的购买力相当于货币的( )
- 8在冷藏的条件下,水果的保鲜时间长。对这种现象的解释不正确的是 [ ]A.温度降低,抑制微生物的繁殖 B
- 9体温计测量体温的部位一般是______、______和______三处.
- 10在人类思想史上,智者学派的主张的价值主要体现在A.对雅典民众的思想启蒙和解放起了积极作用B.是西方思想史上人文主义精神的
热门考点
- 1观察下列图形的构成规律,根据此规律,第10个图形中有( )个圆。
- 2【题文】设函数则的值为 ( )
- 3如图所示,当电路中的开关S闭合,滑动变阻器的滑片P向左移动时,电流表、电压表的示数变化情况是( )A.电流表、电压表的
- 4氢氧化钠固体为什么要密封保存?
- 5ABO血型系统的血型分为___________、___________、___________、___________四
- 6如图所示,敲鼓时洒在鼓面上的纸屑会跳动,且鼓声越响纸屑跳得越高;扬声器发声时纸盆上的纸屑会跳动,且声音越响纸屑跳得越高.
- 7下列句子中加点的成语使用正确的一句是 ( )A.期待已久的《华尔街2:金钱永无眠》终于上映了,观众们拍手称快
- 8Columbus is known for the great discovery ____ a new land-Am
- 9下列做法或现象,容易造成水体污染的是 [ ]①工业“三废”和生活污水的任意排放 ②城镇垃圾的随处堆放 ③天然
- 10***强调:“基本路线要管一百年,动摇不得。”与党在社会主义初级阶段的基本路线形成直接相关的会议是A.十一届三中全会、中