Question

calcular a soma dos 5 primeiros termos da pg (36,216,1296)

Answer 1

(36, 216, 1296, ...)

a₁ = 36

q = 216/36 ----- q = 6


Sn = a₁ (qⁿ - 1)/q - 1 ---  S₅ = 36 . (6 ⁵ - 1)/6 - 1 ------- S₅ = 36 . (7776 - 1)/5

S₅ = 36 . (7775)/5 ------- S₅ = 279900/5 ------ S₅ = 55980