Find the sum to n terms of the A.P. whose kth term is 5k + 1.

Find the sum of first n terms of an A.P. whose nth term is 3n+1.

Find the sum of 40 terms of an A.P. whose third term is 1 and 6th term is - 11.

Find the sum of 32 terms of an A.P. whose third term is 1 and the 6th term is -11.

The sum of n terms of an A.P. whose first term is 5 and common difference is 36 is equal to the sum of 2n terms of another A.P. whose first term is 36 and common difference is 5. Find n.

If S_n denotes the sum of n terms of an A.P. whose first term is a, and the common difference is d Find: = Sn - 2Sn + S(n +2) .

Find the first five terms of the sequence whose n^(th) term is a_n = (-1)^(n + 1) 2n

Find the first five terms of the sequence whose n^(th) term is a_n = (n-1)/(n + 1)

Find the second term and nth term of an A.P. whose 6th term is 12 and 8th term is 22.

Find the 31st term of an AP whose 11^(th) term is 38 and 16^(th) term is 73.