Question

Find an explicit rule for the nth term of the sequence. -3, -15, -75, -375

Answer 1

`\begin{gathered} -3=-3*1 \\ -15=-3*5 \\ -75=-3*25=-3*5^2 \\ -375=-3*125=-3*5^3 \\ \\ \text{ the nth term of the sequence is then} \\ a_n=-3*(5)^n \end{gathered}`