Question

determine o décimo sétimo termo da P.A (-6, -1, 4...)

Answer 1

$a_{17}=a_1+16.R\\ \\ a_{17}=-6+16.5\\ \\ \boxed{a_{17}=74}$

Answer 2

a1=-6
r=-6-1=5
n=17-1
a17=?


an=a1+(n-1).r
a17=-6+16.5
a17=74