Respostas

2013-12-13T09:45:06-02:00
Mr = ms
m = -a/b
mr = -(a+3)/8
ms = -1/2

-(a+3)/8 = -1/2
(a+3)/8 = 1/2
2(a+3) = 8x1
2a+6 = 8
2a = 8-6
2a = 2
a = 2/2
a = 1