题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-68833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-36454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-60380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-29625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-38990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-65358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-97839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-72223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040343-41165.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-31464.png)
解析
试题分析:以OA为x轴,O为原点建立如图坐标系,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-63253.png)
∵半径OA=1,且∠AOB=120°,∴弧AMB的中点M坐标为(
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-19851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-18897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-69647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-25624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040345-22663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040345-87453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040345-80969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040345-90565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040346-49279.png)
∴当m=
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-69647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040346-46300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040346-65109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040346-46300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-69647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040346-65109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040344-69647.png)
核心考点
试题【如图,扇形的弧的中点为,动点分别在线段上, 且若,,则的取值范围是___ ______ 。】;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/20191104/20191104040336-13511.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040328-75806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040329-15453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040329-76273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040329-34638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040325-60830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040325-87867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040325-96710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040325-34170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040317-38397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040317-99609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040317-52415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040318-37512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040318-67106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040318-61488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040310-15873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040310-83910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040310-55329.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040310-83910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104040310-55329.png)
A.![]() | B.2![]() | C.![]() | D.2![]() |
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