Respuesta :

bcalle
3.512, 12.292, 43.022, 150.577, 527.020
Start from the right end and divide the by the previous term.

527.020/150.577 = 3.5

150.577/43.022 = 3.5

43.022/12.292 = 3.5

12.292/3.512 = 3.5
r = 3.5  LETTER B