Respuesta :

HomertheGenius
a 2 = a 1 · r = 6
a 4 = a 1 · r³ = 54
 6 / r = 54 / r³  
6 r³ = 54 r   / : r
6 r² = 54
r² = 54 : 6
r² = 9
r = √ 9 = 3
Answer:
C )  3