Question

Dada a P.G. (3,9,27...) Calcular o Decimo quinto termo? ...Me Ajudem :'()

Answer 1

$P.G. (3,9,27...)\\\\ a_{15} =?\\ a_{1} =3\\n=15\\q=3\\\\\\ a_{n} = a_{1} * q^{n-1} \to \\\\\\ a_{15} = 3 * 3^{15-1} \to\\\\ a_{15} = 3 * 3^{14} \to \\\\a_{15} = 3 * 4.782.969 \to \\\\a_{15} = 14.348.907$