题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-56220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-54182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-87296.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-91870.png)
答案
解析
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-31965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-91870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-71703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-26750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-91870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-56220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-54182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015617-87296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015618-91870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015619-32550.png)
核心考点
试题【已知向量的夹角为,,若点M在直线OB上,则的最小值为 】;主要考察你对平面向量的基本定理及坐标表示等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015607-88078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015607-49327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015607-90981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015607-71309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015608-65026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015608-11170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015608-86815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015607-88078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-29725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-85647.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-85105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-65798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-23733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015609-72328.png)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015610-94500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015610-93088.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015559-85724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015600-51676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015600-72998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015600-86482.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015554-93299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015554-58265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015555-17226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015555-34794.png)
▲ .
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015548-32336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015549-64977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015549-67037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015549-82247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015549-49649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015550-48819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015550-44775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015542-73243.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015543-34740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015543-64075.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015543-64075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015543-69691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015543-47656.png)
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