The interior of a rectangular carton is designed by a certain manufacturer to have a volume of x cubic feet and a ratio of length to width to height of 3 : 2 : 2. In terms of x, which of the following equals the height of the carton, in feet?
A.x的3次方根
B.2x/3的3次方根
C 3x/2的3次方根
D 2/3乘以 x的3次方根
E 3/2乘以 x的3次方根
不知道该怎么解？战友们帮帮忙看看。为什么我的答案从WORD上不能复制到这个上面，好奇怪哦，顺便说说解决办法哈
选D吧
其实题很简单亚，lz仔细读一下就行了
题目给出的条件是 (设length=3a width=2a height=2a)
3a*2a*2a=x 求2a
->12a^3=x
->a^3=x/12
->2a=(2x/3)^(1/3)
| 欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) | Powered by Discuz! 7.2 |