If the sum of `n` terms of an A.P. is `2n^2+5n ,\ ` then its nth term is
a.`4n-3` b. `3n-4` c. `4n+3` d. `3n+4`

Explanation

To find the nth term of the arithmetic progression (A.P.) given that the sum of the first n terms is \( S_n = 2n^2 + 5n \), we can follow these steps:

### Step 1: Write the formula for the sum of n terms of an A.P.
The sum of the first n terms of an A.P. can be expressed as:
\[ S_n = \frac{n}{2} \left(2a + (n-1)d\right) \]
where \( a \) is the first term and \( d \) is the common difference.
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