geometric sequence has $1$ as its third term and $8$ as its sixth term. What is the function that represents the sequence? f$($n$)=2^($n$-1)$ f$($n$)=(1)/(4)*2^($n$-1)$ f$($n$)=(1)/(4)*8^($n$-1)$ f$($n$)=8^($n$-1)$