Question

Determine o termo geral da PG (2,8,...)

Answer 1

Fórmula do termo geral:

$a_1 = 2 \\ q = 4 \\ \\ a_n = a_1.q^{n-1} \\ \\ a_n = 2.4^{n-1} \\ \\ a_n = 2.(2^2)^{n-1} \\ \\ a_n = 2.2^{2n-2} \\ \\ a_n = 2^{1 + 2n - 2} \\ \\ a_n = 2^{2n-1}$