Question

If A = {1, 2} and B = {1, 3}, find A × B and B × A.

Answer 1

Given:
A = {1, 2} and B = {1, 3}
Now,
A × B = {(1, 1), (1, 3), (2, 1), (2, 3)}
B × A = {(1, 1), (1, 2), (3, 1), (3, 2)}