The sum of n terms of AP is given by _____.

Concept: Arithmetic progression (AP) is an arithmetic sequence, which is a collection of series of integers with the same common difference between them.

The formula for sum of n terms of AP is:

$\Rightarrow {\text{S}}_n=\left(\frac{n}{2}\right)\left[2a+\left(n-1\right)d\right]$

Where, n is the nth term,

a is the first term and,

and d is the common difference.