Question

If A={1,2,3} and B={2,4}. State elements of A×A, B×A,(A×B)n(B×A)

Answer 1

A x A = (1,1), (1,2), (1,3), (2,1), (2,2), (2,3), (3,1), (3,2), (3,3)

B x A = (2,1), (2,2), (2,3), (4,1), (4,2), (4,3)

(AxB)n(BxA) = (2,2)