题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084538-11475.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084538-42069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084538-98860.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084538-54751.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084539-58838.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084539-27897.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084539-87389.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084539-17633.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084540-65647.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084540-29672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084540-39242.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084541-37217.gif)
核心考点
试题【自圆外一点向圆引两条切线,切点分别为,则等于 .】;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/20191104/20191104084529-75306.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084529-57714.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084530-36162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084530-38545.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084530-71159.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084530-90347.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084531-90332.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084514-44087.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084515-63775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084515-42288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084515-21982.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084516-46650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084515-42288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084516-27890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084516-90094.jpg)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084510-23230.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084510-52322.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084510-86972.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084511-73028.gif)
在平面直角坐标系中,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084456-10453.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084457-86471.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084457-75183.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084457-84447.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084458-87029.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084458-68815.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084458-90826.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084459-28983.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084459-62369.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084459-60910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084500-79376.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084500-76923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104084500-59510.gif)
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