题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-47834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-78824.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-56030.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-12974.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-90861.gif)
试求:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![]() |
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-32310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-44720.gif)
解析
当
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-17824.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071511-76642.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071511-24832.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071511-60424.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071511-44065.gif)
(1)当且仅当点
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-90861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071512-34975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071512-16576.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
记"
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071512-29058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071512-16282.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-32310.gif)
(2)当且仅当点
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071509-90861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071512-20450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
记"
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071513-25640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071513-63461.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-79168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071510-44720.gif)
核心考点
试题【如图,,,,在线段上任取一点,试求:(1)为钝角三角形的概率;(2)为锐角三角形的概率. 】;主要考察你对等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071501-53460.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071501-62425.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071502-48042.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071502-17277.gif)
求使得△
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071502-45031.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071502-34755.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071502-28181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-96154.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-82491.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-84835.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-31556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-72008.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-23991.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-89796.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-89796.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-72008.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071455-76149.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071443-12907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071443-50071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071443-17206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071443-13978.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071444-57541.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071427-63240.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071427-63240.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071356-11071.png)
一点,则该点落入E(阴影部分)中的概率为( )
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027071422-17470.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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