题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033928-96826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033928-81596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033928-88183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-13928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-91959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-57652.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-22374.png)
解析
试题分析:∵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-13928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-67586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033930-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033930-64804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033930-49224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-91959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033929-57652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033930-45263.png)
核心考点
试题【在中,,,且,则在方向上的投影为 .】;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/20191104/20191104033922-83503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033922-31992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033922-86862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033922-86862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033923-59247.png)
A.![]() | B.![]() | C.![]() | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033913-99330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033914-46304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033914-15476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033914-46939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033914-85890.jpg)
A.最大值为9 | B.为定值![]() |
C.最小值为3 | D.与![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-36949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-72448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-86152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-62100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-62464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-75421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-70258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-62100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-75421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-73456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-70258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-62100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033903-62100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-75421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-75421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033904-70258.png)
A.4 | B.![]() | C.-4 | D.-![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-12835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-38304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-88283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-38304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-88283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-49959.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-64558.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033855-75883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033856-65990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033856-16716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033848-53995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033848-30834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033848-82056.png)
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