题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-35899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-25772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-11775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-26991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-22718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-35899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-28951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-25772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-16724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-35899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-28951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011948-90181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011949-54307.png)
答案
解析
证明:由弦切角定理可得
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011949-51351.png)
核心考点
举一反三
(本小题满分12分)
如图,已知椭圆C1的中心在圆点O,长轴左、右端点M、N在x轴上,椭圆C1的短轴为MN,且C1,C2的离心率都为e,直线l⊥MN,l与C1交
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011941-72467.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011941-97448.jpg)
(I)设e=
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011941-28602.gif)
(II)当e变化时,是否存在直线l,使得BO//AN,并说明理由.
(几何证明选做题)如图
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011935-52196.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011935-13761.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011935-84047.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-93594.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-34494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-23999.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-44356.gif)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-69921.gif)
(3)若AB是
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-13596.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-86748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-92871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-71400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-57263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-61021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-93300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-30066.png)
A.0 B.1 C.2 D.3
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-26697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-42645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-26697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-47618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-48429.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-76542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011916-28077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011916-29003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
最新试题
- 1President Hu Jintao said economic growth is the basis for st
- 2已知△ABC的面积为,AC=2,,则= ( )A.B.C.D.
- 3农业的生产部门有______.
- 4鸟的发育过程包括______、交配、______、产卵、______和______几个阶段,其中,所有鸟都具备的行为是_
- 5若全集为实数集R,集合A={x|log12(2x-1)>0},则∁RA=( )A.(12,+∞)B.(1,+∞)C.[
- 6已知 (注:R,R"为烃基),A为有机合成中间体,在一定条件下发生消去反应,可能得到两种互为同分异构体的产物,其中的一种
- 7设,,为任意非零向量,且相互不共线,则以下结论正确的为 (1)(·)·-(·)·=0 (
- 8—Is your photo in the desk? —________.[ ]A. Yes, I amB.
- 9为适应火车提速,沪宁线上原有的短轨已全部连接为超长轨.工程技术人员先点燃镁条,镁条燃烧产生大量的热使铝热剂(铝粉和氧化铁
- 10 澳大利亚的羊毛产量世界第一,铁矿石的储量丰富,有___________________,____________
热门考点
- 1从H、C、O、N、K、Ca六种元素中,选出适当的元素写出符合下列要求的物质的化学式。(1)饮料中的一种酸是_______
- 2质量为m的物体,从静止出发以g/2的加速度竖直向下运动h米,下列正确的是( )A.物体的重力势能减少mgh/2B.物
- 3下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。 增加:在缺词处加一个漏字符号(/),并在其下面
- 4“绿色食品”指的是A.富含叶绿素的蔬菜B.新鲜的蔬菜C.安全,无公害的食品D.营养价值高的食品
- 5探究规律:如图,已知直线m∥n,A,B为直线m上的两点,C,P为直线n上两点.(1)请写出图中面积相等的各对三角形:__
- 6有材料显示,2009年的美国诸多版本教材不约而同地提到三位中国古代名人——陶渊明、杨玉环和李自成。下列关于这三人的说法错
- 7读图,回答问题.(1)山脉A是______,其南侧的地形区是______.(2)山脉B是______,它位于我国第___
- 8设“●”、“▲”、“■”表示三种不同的物体,现用天平称了两次,情况如图所示,那么●、▲ 、■这三种物体按质量从大到小的顺
- 9当今时代的主题是[ ]A、战争与和平 B、冲突与合作 C、和平与发展 D、反恐
- 10掷两枚硬币,一枚硬币正面朝上,另一枚硬币反面朝上的概率是______.