紧急请教GMAT数学题

bosfashion

If the operation * is defined for all positive integers X and W by X * W=2^X / 2^W, then (3 * 1) * 3 =

A. 2

B. 4

C. 8

D. 16

E. 32

tim_zyb

A

rosemary99

同上

allybin

A。(2^3/2)/[2^(2^3/2)/2^3]=2