A = {11, 12, 13, 21, 22, 23, 31, 32, 33} B = {13, 23, 31, 32, 33} A U B = {11, 12, 13, 21, 22, 23, 31, 32, 33} --> Ou seja, deu o próprio A A inter B = {13, 23, 31, 32, 33} A\B = {11, 12, 21, 22} Complementar de A = {14, 15,16, 24,25,26, 34,35,36 41,42,43,44,45,46, 51,52,53,54,55,56, 61,62,63,64,65,...