Sum of first n terms of an A.P. is of the form An? + Bn i.e. a quadratic expression in n, in such case the common difference is twice the coefficient of n?. i.e. 2A

Sum of first n terms of an A.P.is of the form An^(2)+Bn i.e.aquadratic expression in n, in such case the common differenceis twice the coefficient of n^(2). i.e.2A

Show that the sequence is an A.P.if its nth term is linear expression in n and in such a case the common difference is equal to the coefficient of n.

Show that a sequence is an A.P.if its nth term is a linear expression in n and in such a case the common difference is equal to the coefficient of n.

Show that the sequence is an A.P. if its nth term is linear expression in n and in such a case the common difference is equal to the coefficient of ndot

Show that a sequence is an Adot P .if its nth term is a linear expression in n and in such a case the common difference is equal to the coefficient of n .

Sum of first n terms of an A.P. whose last term is l and common difference is d, is

(vi)A sequence is an AP if the sum of its first n terms is of the form An^(2)+Bn where A and B are constants independent of n. In such a case the common difference is 2A

The sum of n terms of an A.P is n^2 .Find the common difference.

If the sum of first n terms of an A.P. is an^(2) + bn and n^(th) term is An + B then