题目内容
如图,正方体
的棱长为2,动点E、F在棱
上。点Q是棱CD的中点,动点P在棱AD上,若EF=1,DP=x,
E=y(x,y大于零),则
三棱锥P-EFQ的体积
![](http://thumb.1010pic.com/pic2/upload/papers/20140823/201408231611226463191.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140823/20140823161122380507.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140823/20140823161122521277.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140823/20140823161122630227.gif)
三棱锥P-EFQ的体积
A.与x,y都有关 | B.与x,y都无关 |
C.与x有关,与y无关 | D.与y有关,与x无关 |
![](http://thumb.1010pic.com/pic2/upload/papers/20140823/201408231611226463191.jpg)
C
略
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.与x,y都有关 | B.与x,y都无关 |
C.与x有关,与y无关 | D.与y有关,与x无关 |