The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by `(l^2 - a^2)/(k-(l+a))` , then find value of k.

The first and last term of an A.P. are a and l respectively. If S be the sum of all the terms of the A.P., them the common difference is

The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by (l^2-a^2)/(k-(l+a)) , then k= (a) S (b) 2S (c) 3S (d) none of these

The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by (l^2-a^2)/(k-(l+a)) , then k= (a) S (b) 2S (c) 3S (d) none of these

The first and the last terms of an A.P. are 5 and 45 respectively. If the sum of all its terms is 400, find its common difference.

The first and the last terms of an AP are 7 and 49 respectively. If sum of all its terms is 420, find its common difference.

If the sum of first p terms of an AP is ap^2+bp find the common difference

If the sum of first p terms of an AP is ap^2+bp find the common difference

The first term of an A.P.is 2 and the last term is 50. the sum of all these terms are 442. Find the common difference.

The first term of an A.P.is 2 and the last term is 50. the sum of all these terms are 442. Find the common difference.

The first and the last terms of an A.P. are a\ a n d\ l respectively. Show that the sum of nth term from the beginning and nth term from the end is a+ldot