Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
The numbers of seats in the first 12 rows of a high-school auditorium form an arithmetic sequence. The
first row has 9 seats. The second row has 11 seats.
a. Write a recursive formula to represent the sequence.
b. Write an explicit formula to represent the sequence
C. How many seats are in the 12th row?