题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-64906.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-17951.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-90020.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-37287.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-61161.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-64048.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-64022.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070757-48253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070758-83014.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
核心考点
举一反三
已知a、b、c是△ABC三边长,关于x的方程
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070745-73560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070745-93376.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070745-88548.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070746-28575.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070739-97114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070739-35090.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070739-93207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070739-22497.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070740-24601.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070740-73572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070740-47861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070739-97114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070740-84326.gif)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-40768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-16958.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-47064.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-99029.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-50134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-78697.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-39249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070727-78519.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-75286.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-87450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-96696.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-63616.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-31499.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070729-88228.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070729-62101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070728-87450.gif)
(本小题满分10分)
在△ABC中,a,b,c分别为角A,B,C所对的边a,b,c成等差数列,且a=2c
(I)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070720-25467.gif)
(II)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070720-41307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070710-93934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070710-53325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020070710-76684.gif)
最新试题
- 1 若复数(是虚数单位),则在复平面内,复数对应的点位于( )A.第一象限B.第二象限C.第三象限D.第四象限
- 2. Jim sold most of his things. He has hardly __________ left
- 38a·2b=[ ]A.16abB.16a+bC.10a+bD.23a+b
- 4世界人口的增长存在着很大的地区差异.分析下表,关于X国和Y国的正确说法是( ) 国家人口密度(人/平方千米)出生率(%
- 5如图是甲、乙两种固体物质的溶解度曲线.下列说法正确的是[ ]A.t℃时,甲乙两物质的溶解度相等B.甲物质的溶解度
- 6Once a decision has been made,all of us should ____ it.
- 72013年9月29日, 自由贸易区挂牌运作。( )A.广州B.海南C.上海D.北京
- 8甲、乙、丙都属于氧化物;M 是一种不含金属元素的盐;A 、B 是生命活动中不可缺少的物质,其中A 属于单质。它们有如下图
- 9已知等腰三角形ABC的腰长为底边长的两倍,则顶角A的正弦值为( )。
- 10如图,平行导轨间距为d,一端跨接一个电阻为R,磁场的磁感强度为B,方向与导轨所在平面垂直。一根足够长的金属棒与导轨成θ角
热门考点
- 1下列计算正确的是( )A.(a-4)(a+4)=a2-4B.(2x-3)(2x+3)=2x2-9C.(4xy+1)(4
- 2定义:若数列{An}满足An+1=An2,则称数列{An}为“平方递推数列”,已知数列{an}中,a1=2,点(an,a
- 3纳米级四氧化三铁是应用最为广泛的软磁性材料之一。共沉淀法是目前制备纳米四氧化三铁的重要方法,其流程如图示:下列说法不正确
- 4(11分)阅读下面这首宋诗,完成下列各题。舟中二首(其一)①陈师道恶风横江江卷浪,黄流湍猛风用壮②。疾如万骑千里来,气压
- 5下列运算正确的是[ ]A.3x2+2x3=5x5B.2x2+3x2=5x2C.2x2+3x2=5x4D.2x2+
- 6从集合M={1,3,5,7,9},N={0,2,4,6,8}各取2个数组成四位数,则5的倍数有几个
- 7端午节,小承和小冬帮妈妈煮粽子.煮粽子的水烧开后,小承认为要继续将火烧得很旺,使锅内水剧烈沸腾,这样会很快将粽子煮熟;小
- 8下列各句中,没有语病且句意明确的一句是(3分)( )A.大邱市政府18日表示,大邱市将推出一款“大邱星星旅游”,配上“
- 9已知向量,,,若三点共线,则实数的值为 _ .
- 10材料一:洋洋刚打开QQ,一行留言就跳了出来:“恭喜你中奖了!你的QQ号被腾讯网抽为幸运号码,奖品是新款笔记本电脑。领奖事