Zadanie 7.
a) A={..., -21, -14, -7, 0 ,7, 14, 21, 28, 35, ...}
b) B = {0, 4, 8, 12, 14, 20,...}
c) C = {1, 3, 5, 7,9,11}
d) D = {-10, -7, -4, -1, 2, 5}
e) E = {-17, -13, -9, -5, -1}
f) F = {... , -13, -8, -3, 2, 7, 12, 17, ...}
