题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030938-30668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030938-63528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030939-47650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030939-53005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030939-67018.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
由两个正数
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030938-30668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030938-63528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030939-47650.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030940-54968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030940-82139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030940-42714.png)
设双曲线的半焦距为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030941-30509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030941-14419.png)
于是由双曲线的离心率的定义有
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030941-11156.png)
所以正确答案为C
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030929-31260.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030929-64717.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030929-69497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030929-50048.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-90078.gif)
(2)过F1作不与
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-19421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-46941.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-46941.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-44739.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030930-45734.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030931-43364.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030915-25046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030916-61277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030916-71195.png)
A.![]() | B.![]() | C.![]() | D.![]() |
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030857-26802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030857-72526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030857-16498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030858-13371.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030858-60976.gif)
(Ⅰ) 求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030857-26802.gif)
(Ⅱ) 过点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030858-60868.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030858-46757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030858-51869.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-66835.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030857-26802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-51298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-67741.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-21857.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-66835.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-51298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-67741.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-21857.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030859-21857.gif)
(本小题满分14分)
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030845-87947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030846-61157.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030846-99772.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030846-57512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030846-50988.gif)
(Ⅰ) 求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030845-87947.gif)
(Ⅱ) 过点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-57014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-65218.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-92253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-35425.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030845-87947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-34231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030848-83122.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030848-53409.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-35425.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030847-34231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030848-83122.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030848-53409.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030848-53409.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030835-58331.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-99385.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-66510.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-33799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-80120.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-26863.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-13684.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-26497.gif)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
(2)若倾斜角为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-64286.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-79791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
点,求弦MN的长;
(3)点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-69604.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-69604.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-98799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-43300.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030836-81146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-51787.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026030837-60054.gif)
最新试题
- 1绿色植物吸收光能,养育了地球上的其他生物。这句话可以用“太阳能—→植物体内有机物的能量—→动物体内有机物的能量—→生命活
- 2动物的运动对自身有十分重要的意义,下列对动物运动的意义叙述错误的是 ( )A.能使动物适应任何生活环境B.能
- 3My mum will cook ________ for the guests. [ ]A.
- 4(18分)一辆汽车以54km/h的速度匀速行驶,现在前方出现红灯,汽车以1 5m/s2的加速度做匀减速直线运动恰好在斑马
- 5句型转换。1. Math is my favorite subject.(同义句)I ______ math _____
- 6在中,角所对的边分别为,且满足,。(1)求的面积; (2)若,求的值。
- 7材料一:新修订的《未成年人保护法》自2007年6月1日起施行。这次修改更加突出地体现了“保护未成年人优先”的原则。增加以
- 8下面有关名著中人物动作语言的描写,各是指的谁,把他们的名字写在横线上。①他用舵把对准鲨鱼的头打去,鲨鱼的两颚正卡在又粗又
- 9下列有关人体水分调节的叙述,正确的是[ ]A.大量饮水,则抗利尿激素分泌增加B.渴觉中枢兴奋,则抗利尿激素分泌减
- 10阅读理解。 谢太傅寒雪日内集,与儿女讲论文义。俄而雪骤,公欣然曰:“白雪纷纷何所似?”兄子胡儿曰:“撒盐空中差可拟。”
热门考点
- 1下列命题是假命题的是 [ ]A.平行四边形的对边相等 B.四条边都相等的四边形是菱形 C.矩形的两条对角线互
- 2读图8,若图中三条曲线代表副热带海区近海岸海水等温线,回答15~16题。小题1:若该图所示是大洋西部,则该处可能是(
- 32011年11月初,由陈文贵编剧、阎建钢执导的大型历史电视剧《赵氏孤儿》在浙江象山影视城开拍。2600年前的赵氏孤儿的故
- 4中共三大提出:“共产党员应该出来联合全国的革命党派,组织民主的联合阵线,以扫清封建军阀,推翻帝国主义压迫,建立真正民主政
- 5苏格拉底、柏拉图、亚里士多德的共同点是( )A.关注人类社会或生活B.研究自然和观察世界C.忽视道德,追求功利D.反
- 6微写作。(10分)(从以下三题中任选一题进行写作)①人生会有很多离别,请描述一个离别的场景,表达某种情思。要求:请写一段
- 7从1,2,3,4,5五个数中任意取出2个数做加法,其和为偶数的概率是[ ]A.B.C.D.
- 8阅读下列材料并回答问题:材料一 二战临近结束时,这种共同的危险促成的合作开始动摇。合作者们为了各自心目中的国家利益宁愿牺
- 9青春只表现在随着年龄的增长而带来的身体变化。[ ]
- 10一理想变压器原、副线圈匝数比n1:n2=11:5.原线圈与正弦交变电源连接,输入电压u如图所示.副线圈仅接入一个10Ω的