Maths-

General

Easy

Question

# Write explicit formula.

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=77-21n

### Explanation:

- We have given
- We have to find the explicit formula of the given sequence.

Step 1 of 1:

We know that the recursive formula of an AP is , where d is common difference.

Here we have

So, d = -21

Also, We have a_{1} = 56

So, The explicit formula will be

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