Răspuns:
5.
A = {1, 3, 5, 7, 9}
B = {2, 4, 6, 8}
C = {1, 4, 7, 10}
6.
A = {0, 1, 2, 3, 4, 5, 6, 7, 8}
B = {2, 3, 4, 5, 6, 7, 8, 9, 10}
C = {2, 3, 4, 5, 6}
D = {1, 2, 3, 4, ..., 2019, 2020}
E = {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32}
F = {203}
G = ∅
7.
A = {x | x este numar natural, 0 ≤ x ≤ 6}
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