Question

Calcule o 8° termo da pg (8,16,32..)

Answer 1

Vamos começar calculando a razao:

$razao=\frac{a_{n+1}}{a_n}\\\\razao=\frac{a_2}{a_1}\\\\razao=\frac{16}{8}\\\\razao = 2$

Agora utilizando a equação do termo geral:

$a_n=a_1.q^{n-1}\\\\a_8=8.2^{8-1}\\\\a_8=8.2^7\\\\a_8=8\;.\;128\\\\a_8=1024$