Question

determine o 8 termo da pg (3,9,27...)

Answer 1

a₁ = 3
q = 3
a₈ = ?
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Pelo termo geral:

$a_n = a_1\cdot q^{n-1} \\ \\ \\ a_8 = 3.3^7 \\ \\ a_8 = 3^8 \\ \\ \\ \boxed{a_8=6561}$

Answer 2

an=a1.q^n-1

an= 3. 3^8-1

an= 3.3^7

an= 3. 2187

an= 6561