Question

Let A = {1, 2, 3, 4}, B = {4, 5, 6}, C = {5, 6}. Find A × (B ∪ C).

Answer 1

A = {1, 2, 3, 4}, B = {4, 5, 6}, C = {5, 6}

B ∪ C = {4, 5, 6}

∴ A × (B ∪ C)

= {(1, 4), (1, 5), (1, 6), (2, 4), (2, 5), (2, 6), (3, 4), (3, 5), (3, 6), (4, 4), (4, 5), (4, 6)}