-2 2/3, -5 1/3, -10 2/3, -21 1/3, -41 2/3 Which formula can be used to describe the sequence?
A. f(x + 1) = –2f(x)
B. f(x + 1) = f(x)
C. f(x + 1) = f(x)
D. f(x + 1) = 2f(x)