Can someone please walk me through how to do this question?

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?

Question

Can someone please walk me through how to do this question?

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?

jim_thompson5910 · Answer

what do you have so far?

redneck88 · Answer

Im honestly lost. Ive been doing this unit and im finding geometric and arithmetic sequences and series very enjoyable but i cant wrap my head around a and b. C I have.