TTGWD11-27

nickynicky

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

Redshoe08

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)