题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043218-54911.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043218-79589.png)
解析
试题分析:因为点O是线段AB的中点,所以向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043218-99135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-60375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043218-54911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-38554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-91403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-38554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-91189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043219-50145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043220-36580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043220-53795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043218-79589.png)
核心考点
试题【半圆的直径AB=2, O为圆心,C是半圆上不同于A、B的任意一点,若P为半径OC上的动点,则的最小值是 ________________; 】;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/20191104/20191104043211-69262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043211-62185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043211-23931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043211-97159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043212-27831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043212-11307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043212-62206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043203-94854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043203-67711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043203-45187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043203-62037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043203-32231.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043155-77144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043155-67281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043156-49320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043147-14777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-95331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-22360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-23236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-17801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-60927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104043148-70158.png)
A.150° | B.90° | C.60° | D.30° |
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