Question

Qual soma da pg a1=3, q=2 e n=10

Answer 1

$Sn = \frac{a_{1} ( q^{n} - 1)}{q - 1} \\ \\ Sn = \frac{3(2^{10} - 1)}{2 - 1} \\ \\ Sn = \frac{3(1024-1)}{1} \\ \\ Sn = 3(1023) \\ \\ Sn = 3069$