Question

determine o décimo quinto termo da p.a (6, 10, 14)

Answer 1

a1 = 6
r = 4
an =
n = 15

an = a1 + (n - 1) . r
an = 6 + (15 - 1) . 4
an = 6 + 14 . 4
an = 6 + 56
an = 62