Răspuns:
a) {1,2,3,4,6,12}
b){0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18}
c){-2,-1,0,1,2,3}
d){-16,-14,-12,-10,-8,-6,-4,-2,0,2}
e) {-3,-2,-1,0,1,2,3,4,5,6,7,8,9}
f) {11}
