Question

Determine o quinto termo da P.G. (3,6,.....)

Answer 1

Resposta:

Esquema:

$a_5 = ?$

$a_1 = 3$

$a_2 = 6$

$q = \dfrac{a_2}{a_1} = \dfrac{6}{3} = 2$

Resolução:

$a_n = a_1 \times q^{n -\, 1}$

$a_5 = 3 \times 2^{(5 -\, 1)}$

$a_5 = 3 \times 2^{4}$

$a_5 = 3 \times 16$

$a_5 = 48$

P.G = ( 3, 6, 12, 24, 48)