题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-71034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-81296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-97972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-76056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-13717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045755-40778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045755-16380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045755-17092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-97055.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-67859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-51392.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-71034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-81296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045754-97972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-45924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-88234.png)
⑴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045755-16380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045755-17092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045757-38282.png)
⑵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045756-97055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045757-60400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045757-38815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045758-89108.png)
点评:若两向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045758-53713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045758-91002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045758-53713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045758-24723.png)
核心考点
试题【已知,,的夹角为60o, , ,当实数为何值时,⑴∥ ⑵】;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/20191104/20191104045746-11066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045746-49334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045746-87562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045747-86033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045747-20609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045739-90262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045739-40307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045739-28253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045739-63777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045739-87385.png)
A.![]() | B.12 | C.4 | D.2![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045733-26160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045728-96513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045728-92545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045728-32069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045728-96513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045728-92545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045720-99289.png)
求:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045720-96384.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104045721-56014.png)
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