Respostas

2014-05-16T08:02:32-03:00
A¹=8
a²º=30

a²º= a¹ + (n-1) r
30= 8 + 19r
-19r = 8 - 30
-19r = -22
19r= 22
r= 22/19
r=1,16
2 4 2
essa ee a resposta certa ???
sim
obgg! !!