Question

Dada a P.A ( 28,36,44,52..) determine :
a) Oitavo Termo

Answer 1

an=a1+(n-1)r
a8=28+(8-1)8
a8=28+ 56
a8=84

Answer 2

an=a1+(n-1)r
a8=28+(8-1)8
a8=28+7x8
a8=28+56
a8=84

Espero ter ajudado.