Question

Determine a razão da seguinte PG: ( 81, 27, 9, ...)

Answer 1

q = a2/a1
q = 27/81
q = 1/3

Answer 2

$q= \dfrac{A_n}{A_n-1} \\\\\\\\q= \dfrac{27}{81} \\\\\\\\q= \dfrac{1}{3}$


Forte abraço!