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# A city sets up 14 rows of chairs for an outdoor concert. Each row has 2 more rows than the row in front of it. Write a recursive formula to represent the number of chairs in the n^{th} row.

Hint:

- A sequence is said to be arithmetic if the common difference is always constant.
- The General formula of any AP is .

## The correct answer is: a_n=a_(n-1)+2.

- A city sets up 14 rows of chairs for an outdoor concert. Each row has 2 more rows than the row in front of it
- We have to find the recursive formula to represent the number of chairs in the nth row.

Step 1 of 1:

Here it will be an AP, with common difference 2.

So, The recursive formula will be

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