Question

Numa pg de a1=2 e q=3 , calcule a7?

Answer 1

Resposta:

$a_7=1458$

Explicação passo-a-passo:

$a_1=2;\ q=3\\\\ a_n=a_kq^{n-k}\ \therefore\ a_7=a_1q^{7-1}\ \therefore\\\\ a_7=a_1q^6=2(3)^6=2(729)\\\\ a_7=1458$