If sum of n terms of an ap is 3n2 n

- If the sum of first n terms of an ap is 3n2 n
- If sum of first n terms of an ap is sn 3n2 n
- If the sum of n terms of an ap is 2n 3n2 the nth term would be
- Arithmetic progression sum of n terms
- Finding the sum of an infinite arithmetic series
- How to find sum of arithmetic progression
- The sum of infinite series