12/11-1=1/11
13/22-1/2=13/22-11/22=2/22=1/11
14/33-1/3=14/33-11/33=3/33=1/11
............................................
110/1089-1/99=110/1089-11/1089=99/1089=1/11
(1/11+1/11+...+1/11) de cate ori??
de la 12 la 110 avem 110-12+1=110-11=99 de numere
deci 99*1/11=9
care este patratul lui 3, rasp corect C
