Resposta :
Resposta:
aJAXB=((11). (1,2), (1,3), (1,4), (1,6), (241), (2,2), (2,3), (2, 4), (2, 6), (3,1), (3,2), (3,3), (3,4),(3,6))
b) [(xy) E AxB/x=y) Ri = ((1,1), (2,2), (3,3))
cX (xy) E AxB/ "y é o dobro de x")
R2 = ((1,2), (2,4), (3,6))
dX (xy) E AxB/" x é a metade de y") R3 = ((1,2), (2,4), (3,6)) ((xy) E AxB/ y=x+1)
R4 = ((1,2), (2,3), (3,4))