Question

If A = {3, 4} and B = {5, 6} then B x A is

• A. {(3, 5), (3, 6), (4, 5), (4, 6)}
• B. {(5, 3), (5, 4), (6, 3), (6, 4)}
• C. {3, 4, 5, 6}
• D. ф

Answer 1

Cartesian product B x A of two sets A and B is given by

B x A = {(a, b): a ϵ B, b ϵ A}

Hence, B x A = {(5, 3), (5, 4), (6, 3), (6, 4)}