题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201403-33091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201403-14975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201403-81624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201403-58755.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201404-32919.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201404-69430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201404-70658.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201405-99270.png)
点评:中档题,本题综合考查平面向量的坐标运算,平面向量模的计算,二次函数的图象和性质。较为典型,函数方程思想、转化与化归思想的灵活应用,有助于解题。
核心考点
试题【向量,若,其中,则的最小值为--------------- 】;主要考察你对空间向量的直角坐标运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-65170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-52557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-69641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-77802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-80443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-81884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-80443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-44860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-69272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-80381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-50592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-65170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-39184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-97181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-99543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201357-97181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201356-65170.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-13918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-49312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-29273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-97785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-26850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-93594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-36548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201345-74765.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201346-52914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-47214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-49188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-21784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-62250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-13767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-48958.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201331-70309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201331-95380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-84865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-13370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-37945.png)
最新试题
- 1完形填空。 I sat down to read under an old tree in the park.
- 2有一家用电熨斗,其电路结构如图甲所示,改变内部连线方式可以使电熨斗处于断开状态和获得低、中、高三个不同的温度挡,图乙是它
- 3球的飞行高度h(m)与飞行时间t(s)之间的关系式为h=20t-5t2,则t=______秒时,球的飞行高度为15m.
- 4在△ABC中,角A,B,C的对边分别为a,b,c.已知A=π4,bsin(π4+C)-csin(π4+B)=a,(1)求
- 5方程2x+a﹣4=0的解是x=﹣2,则a等于 [ ]A.﹣8B.0C.2D.8
- 6如图甲所示为一列简谐横波在t=0时刻的波形图,图乙是这列波中P质点的振动图象。P点的平衡位置坐标是x=10m。(1)试求
- 7一个内壁光滑的圆柱形气缸,质量为M,底面积为s,缸内有一个质量为m的活塞,封闭了一定质量的理想气体,不计活塞厚度。当温度
- 8下列内容中属于中国特色社会主义政治制度的是①人民代表大会制度 ②以公有制为主体,多种所有制经济共同发展 ③人民民主专政
- 9下列实验操作符合规范要求的是( )A.在“高锰酸钾制氧气”实验中,收集完气体先将导管移出水槽再停止加热B.在“粗盐的提
- 10已知二次函数y=x2-6x+m的最小值为1,求m的值.
热门考点
- 1下列关于单细胞生物的叙述中,错误的是( )A.整个身体由一个细胞构B.能够完成呼吸排泄和对外界刺激发生反应等各项生命活
- 2A computer can think logically and work millions and million
- 3阅读理解。Train No.FromToDeparture TimeArrival Time11BeijingSheny
- 4计算:(1)212+3113-513-2348 (2)(6x4-2x1x)÷3x.
- 5质谱仪是测量带电粒子的质量和分析同位素的重要工具,如图为质谱仪原理示意图。现利用这种质谱议对氢元素进行测量。氢元素的各种
- 6电动汽车的社会化之所以前景光明,是因为电动汽车( )①符合能源紧缺的实际,遵循了汽车产业的发展规律②彻底否定了传统燃
- 7小明按如图所示的滑轮组实验时,用F=50N的拉力在3s内将重为120N的物体匀速提高了10cm.求:(1)滑轮组的机械效
- 8—Who will teach you to speak English?—The twins. _____ Lucy
- 9加热试管,不会引起试管破裂的是[ ]A.试管里装有水 B.加热时试管外壁有水 C.加热时,试管未先均匀受热 D.
- 10下边的天气符号代表的天气状况填写在横线上.______、______、______、______、___________