Question

dados os conjuntos A={1,2,3,4,5,6} e B={2,4,6,8}, assinale a alternativa correta para
R={(x,y)e A x B | x>y}

Answer 1

A={1,2,3,4,5,6}  B={2,4,6,8}

A x B = (1,2), (1,4), (1,6), (1,8), (2,2), (2,4), (2,6), (2,8), (3,2), (3,4), (3,6), (3,8), (4,2), (4,4), (4,6), (4,8), (5,2), (5,4), (5,6), (5,8), (6,2), (6,4), (6,6), (6,8)

como estamos interessados nos pares em que x >y, então só irão importar os pares:
(3,2), (4,2), (5,2), (6,2), (6,4)