Question

Let A = {1, 2, 3, 4} and B = {5, 7, 9}. Determine B × A

Answer 1

Since A = {1, 2, 3, 4} and B = {5, 7, 9}.

Therefore, B × A = {(5, 1), (5, 2), (5, 3), (5, 4), (7, 1), (7, 2), (7, 3), (7, 4), (9, 1), (9, 2), (9, 3), (9, 4)}