Respostas

2013-12-02T11:09:52-02:00
A1 = 3/4
q = a2/a1
q = (-1/2)/(3/4)
q = (-1/2).(4/3)
q = -4/6 
q = -2/3
Sn = a1/(1-q)
Sn = (3/4)/(1-(-2/3))
Sn = (3/4)/(1+2/3)
Sn = (3/4)/(3/3+2/3)
Sn = (3/4)/(5/3)
Sn = (3/4).(3/5)
Sn = 9/20