What of the following is an arithmetic sequence?
A. 800, 20p, 50, ...
B. 1, 3, 9, 27, ...
C. 1, 0, 1, 0, 1, 0, ...
D. 10, 7, 4, 1, -2, ...

Respuesta :

Answer: B

1,3,9,27,...

3^0,3^1,3^2,3^3,....