The first term of an AP. of consecutive integer is `p^2 + 1.` The sum of `(2p + 1)` terms of this series can be expressed as

The first term of an A.P of consecutive integers is p^(2) + 1 . The sum of (2p + 1) terms of this series can be expressed as

The sum of the first three terms of an A.P. is 9 and the sum of their squares is 35. The sum to first n terms of the series can be

The sum of four consecutive terms of an A.P. Is 2. The sum of the 3rd and 4th terms is 11. Find the terms.

The sum of four consecutive terms of an A.P. is 2. The sum of the 3rd and 4th terms is 11. Find the terms.

In an A.P, the first term is 1 and sum of the first p terms is 0, then sum of the first (p + q) terms is

If the sum of first n terms of an A.P. series is n^(2) +2n, then the term of the series having value 201 is-

The first term of an A.P. is a. If sum of first p terms is zero, prove that the sum of first (p + q) terms is [a(p+q)q]/(1-p) .

The sum of first 20 terms of an A.P. is one third of the sum of next 20 term. If first term is 1, find the sum of first 30 terms of this A.P.