题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-80031.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-17821.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-35261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-39982.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-54526.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065405-91977.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065406-89322.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065406-63141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065406-10729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065406-85437.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065407-31226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065407-92989.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065407-34096.gif)
解析
核心考点
试题【(12分)已知且与的夹角为,求的值。】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065355-82831.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065356-43274.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065356-40648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065356-59271.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065356-11093.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065357-88811.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065357-40238.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065357-84183.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065357-40238.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065357-85547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065349-78647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065349-11206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065349-66166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065350-41130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065350-60317.png)
A 4 B 8 C 0 D 2
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065343-87346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065344-58082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065344-64992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065344-62993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065345-64005.png)
A 1 B 4 C 2 D 5
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065335-17013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065336-72614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065336-26964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065336-32862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065335-17013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065336-72614.png)
A
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065336-83123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065337-51196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065337-39809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065337-53566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065327-70082.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065327-81704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104065327-76084.gif)
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