Question

Obter a razão de cada PG (-12, -3, 0.75 )

Answer 1

$razao=\frac{a_{n+1}}{a_n}\\\\razao=\frac{a_2}{a_1}\\\\razao=\frac{-3}{-12}\\\\razao=\frac{1}{4}\\\\razao=0,25$

Answer 2

An = a¹ . q n- 1

An= termo geral

a¹ primeiro termo

n número de termos

q razão