Question

Dados A = { 5,6 } e B = {3,4,5,6} , determine o numero de elementos de :
A) AXB
B) AXA
C) BXA
D) B²

Answer 1

A x B = {(5,3);(5,4);(5,5);(5,6);(6,3);(6,4);(6,5);(6,6)}
A² = {(5,5);(5,6);(6,5);(6,6)}
B x A = {(3,5);(3,6);(4,5);(4,6);(5,5);(5,6);(6,5);(6,6)}
B² = {(3,3);(3,4);(3,5);(3,6);(4,3);(4,4);(4,5);(4,6);(5,3);(5,4);(5,5);(5,6);(6,3);(6,4);(6,5);(6,6)}