Question

interpole oito meios aritmético entre 26 e -1

Answer 1

a1=26
an=-1
n=10
razão=?

an=a1+(n-1).r
-1=26+(10-1).r
-1=26+9r
-1-26=9r
-27=9r
r=-27/9
r=3


(26,23,20,17,14,11,8,5,2,-1...)