Продовж ряди 1) 15,12,9,6,....,....2)2,3,5,6,8,9,11,12,...,....
1]15 12 9 6 3 0. 2] 2 3 5 6 8 9 11 12 14 15 :-)
1)15,12,9,6,3,0.2)2,3,5,6,8,9,11,12,14,15.