题目
题型:不详难度:来源:
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答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012843-30043.png)
解析
试题分析:依题意,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012843-86553.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012845-53142.png)
核心考点
试题【给定两个长度为1的平面向量和,它们的夹角为,点在以为圆心的劣弧上运动,若=+,其中,则的取值范围是 .】;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/20191104/20191104012833-64711.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012833-64711.png)
A.直角三角形 | B.钝角三角形 |
C.等边三角形 | D.等腰三角形但不是等边三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012827-70782.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012808-40543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012808-41682.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012809-89565.jpg)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012809-69965.png)
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(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012810-46617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012810-40722.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012801-38740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012802-11951.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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