If the sum of n terms is
- If the sum of n terms is 3n2 5n
- If the sum of n terms is 2n2 5n
- If the sum of n terms is 3n2 4n
- If sum of n terms of an ap
- 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
- If the sum of first n terms is
- If the sum of n terms is 3n2 n
- If the sum of n terms of gp is 255
- If the sum of n terms of ap is 3n 2 5n
- If the sum of n terms of an ap is 2n 2 5n
- If the sum of n terms of an ap is pn qn 2
- If the sum of n terms of an ap is na n2b
- If the sum of n terms of an ap is 3n2 5n