Question

An arithmetic sequence had recursive formulawhat is the explicit for this sequence

Answer 1

Given;

`a_1=7,a_n=a_(n-1)-4`
`\begin{gathered} n=2; \\ \\ a_2=a_1-4=7-4 \\ \\ a_2=3 \\ \\ n=3; \\ \\ a_3=a_2-4=3-4 \\ \\ a_3=-1 \\ \\ a_n=7+(n-1)(-4) \end{gathered}`

CORRECT OPTION: C