Răspuns:
Explicație pas cu pas:
A = {1, 2, 3, 4, 8, 11, 13, 15}
B = {1, 2, 4, 5, 6, 9, 11, 12}
C = {1, 2, 6, 7, 8, 9, 10, 14, 15}
A U B = {1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 15}
A ∩ B = {1, 2, 4, 11}
A \ B = {3, 8, 13, 15}
B \ A = {5, 6, 9, 12}
A U B U C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
A ∩ B ∩ C = {1, 2}