Question

1° Dados os conjuntos, A = {1, 2, 3} e B = {2, 5}, determine
a) A x B =. b) B x A​

Answer 1

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

b) BxA={(2,-1),(3,-1),(2,0),(3,0),(2,1),(3,1),(2,2),(3,2)}

c) A^2={(-1,-1),(-1,0),(-1,1),(-1,2),(0,-1),(0,0),(0,1),(,2),(1,-1),(1,0),(1,1),(1,2),(2,-1),(2,0),(2,1),(2,1)}

d)B^2={(2,2),(2,3),(3,2),(3,2)}