Question

Sejam A= {1,2,3} e B= {0,1}, informe:
a) n (AxB)
b) AxB
c) BxA
d) AxA

Answer 1

a) Temos que, primeiro, descobrir quem é (AxB) para depois calcular o número de elementos que ele possui.

AxB = {(1,0), (1,1), (2,0), (2,1), (3,0), (3,1)}

Portanto, n(AxB) = 6 elementos.

b) AxB = {(1,0), (1,1), (2,0), (2,1), (3,0), (3,1)}

c) BxA = {(0,1), (0,2), (0,3), (1,1), (1,2), (1,3)}

d) AxA = {(1,1), (1,2), (1,3), (2,1), (2,2), (2,3), (3,1), (3,2), (3,3)}