The sum of first n terms is
- The sum of first n terms is 5n2 3n
- The sum of first n terms is 3n2/2+5n/2
- The sum of first n terms is 4n2 2n
- The sum of first n terms is 3n2 2 13n 2
- The sum of first n terms is 3n2 6n
- Sum of the first n terms of an arithmetic progression
- If the sum of first n terms is n2
- If the sum of first n terms is cn 2
- If the sum of first n terms is 4n n2
- The sum of the first n terms is 4n 2
- If the sum of first n terms is
- The sum of first n natural terms is
- The sum of first n terms of ap is
- The sum of first n terms of ap is 5n 2 3n
- The sum of first n terms of an ap is 3n 2 4n