Ta có:
A = {0, 2, 4, 6, 8, 10}
B = {0,1, 2, 3, 4, 5, 6}
C = {4, 5, 6, 7, 8, 9, 10}
a) (B ∪ C) = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
A ∩ (B ∪ C) = {0, 2, 4, 6, 8, 10}
b) A\B = {8, 10}; A\C = {0, 2}; B\C = {0, 1, 2, 3}
⇒ (A\B) ∪ (A\C) ∪ (B\C) = {0, 1, 2, 3, 8,10}