Question

fie X={1,2,3},Y={5,b}.scrieti produsul cartezian:a)XxY b)YxXc)XxXd)YxY

Answer 1

X = {1,2,3}

Y = {5,b)

a) X x Y = {(1,5); (1,b); (2,5); (2,b); (3,5); (3,b)}

b) Y x X = {(5,1); (5,2); (5,3); (b,1); (b,2); (b,3)}

c) X x X = {(1,2); (1,3); (2,3)}

d) Y x Y = {(5,b)}