题目
题型:不详难度:来源:
![](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.-![]() |
答案
解析
试题分析:在
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033905-80968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033905-75501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033905-67554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033906-37052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033906-79528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033906-56925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033906-65918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033907-96658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033907-94341.png)
考点:平面向量数量积的坐标运算.
核心考点
试题【在ABC中,=,=, 且满足:||=1, ||=2, ||=,则·+·+·的值为( ).A.4B.C.-4D.-】;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/20191104/20191104033855-12835.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)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033839-20086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033839-31306.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033832-35323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033832-26000.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033827-92810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033827-99808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104033827-96411.png)
A.(-3,0) | B.(2,0) | C.(3,0) | D.(4,0) |
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