Respostas

2013-05-16T22:12:54-03:00

A = (1/2).(1/2) - 2/3 = -5/12

B = 1/2.2/3 - 2/3 = 1/3 - 2/3 = 3/3 = 1

 

-5/12 - 1 = -17/12

2 3 2