Question

How to solve a sequence

Answer 1

`\begin{gathered} \text{Let:} \\ a_1=2 \\ \text{ Recursive formula}\colon \\ a_n=a_(n-1)+7 \\ \text{Explicit formula:} \\ a_n=2+7(n-1) \end{gathered}`

`\begin{gathered} \text{Let:} \\ a_1=2 \\ \text{ Recursive formula:} \\ a_n=7(a_(n-1)) \\ \text{Explicit formula:} \\ a_n=2\cdot7^(n-1) \end{gathered}`