Question

Which formula can be used to describe the sequence?

Answer 1

Answer: B. f(x) = -3(1/5)^x-1

Answer 2

Each term is multiplied by -1/5
first term is -3

an=a1(r)^(n-1)
for a1=first term
r=common ratio
n=which term


in this case
first term=-3
common ratio is -1/5
so

$f(x)=-3( \frac{-1}{5})^{x-1}$

none of them
oh, A and B are the same
the one that has the -1/5 inside is the one