Question

CALCULE A SOMA DOS DOZE PRIMEIROS TERMOS DA PG (5,25,125)..

Answer 1

Resposta:

P.G crescente e infinita (5, 25, 125, ...)

a1 = 5

q = 5

Sn = 305175780

$Sn = \frac{a1. (q^{n} -1 )}{q - 1}\\\\Sn = \frac{5. (5^{12} -1 )}{5 - 1}\\\\Sn = \frac{5. (244140625-1 )}{4}\\\\Sn = \frac{5. 244140624}{4}\\\\Sn = 5. 61035156\\\\Sn = 305175780$