Respostas

2014-03-26T13:10:05-03:00
A = {3,4,5,6,7}
B = {5,6,7,8,9}
A-B = {3,4}
B-A = {8,9}
[AUB] - [AinterB] = {3,4,5,6,7,8,9} - {5,6,7} = {3,4,8,9}