Question

encontra a razão da progressão (-5,-15,-45,-135...). obrigado

Answer 1

P.G.(-5,-15,-45,-135...)

razão: q = 3, pois
$q = \frac{a2}{a1} = \frac{ - 15}{ - 5} = 3$

Answer 2

$q=\frac{a_n}{a_{n-1}} =\\ \\ q=\frac{-15}{-5} =\\ \\ q=3$