Answer
See answers below
Work Step by Step
The starting value $A_1$ is $0$. The common difference $d$ is $9$.
The recursive formula is $A(1)=0; A(n)=A(n-1)+9$
The explicit formula is: $A(n)=0+(n-1)9$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.