Question

How do I find the next 5 terms of this sequence

Answer 1

`\begin{gathered} a1=\text{ - 4} \\ \\ a_n=2a_{n\text{ -1}}\text{ - 1} \\ \\ a2=2a_1\text{ -1} \\ a2=2(\text{ -4\rparen - 1} \\ a2=\text{ -8 - 1} \\ a2=\text{ -9} \\ \\ a3=2a2\text{ - 1} \\ a3=2(\text{ -9\rparen - 1} \\ a3=\text{ -18 -1} \\ a3=\text{ -19} \\ \\ a4=2a3\text{ - 1} \\ a4=2(\text{ -19\rparen - 1} \\ a4=\text{ -38 - 1} \\ a4=\text{ -39} \\ \\ a5=2a4\text{ - 1} \\ a5=2(\text{ -39\rparen - 1} \\ a5=\text{ -78 -1} \\ a5=\text{ -79} \end{gathered}`