c) (1/4)^3= 1/64 apartine Q
d) (1/V6)^2 = 1/6 apartine Q
e) (-1/2)^4 = 1/16 apartine !
f) (1/2V2)^3 = 1/8V8 = 1/16V2 nu apartine Q
g) (V11/V5)^2 = 11/5 apartine Q
h) (3/2V3)^3 = 27/8V27 = 27/23V3 nu apartine Q
