Respostas

2014-05-09T15:18:09-03:00
An=a1+(An-1)r ; r = 5-8 = -3
An=8+(11)-3
A12=8+(-33)= -25
==> A12 =  -25
:
8,5,2,-1,-4,-7,-10,-13,-16,-19,-22,-25
:

Era isso ? Espero que sim !
obrigado