If the sum of first n terms is `(3n^(2) +5n)`, find its common difference.

The sum of first n terms of an AP is (3n^(2) + 6n) . The common difference of the AP is

The sum of first n terms of an A.P. is 5n ^(2)+ 4n, its common difference is :

The sum of first n terms of an A.P. is 5n ^(2)+ 4n, its common difference is :

If the sum of n terms of an A.P. is 3n + 2n^(2) , find the common difference

The sum of the n terms of an AP is 2n^(2)+5n and its common difference is 6, then its first term is

In an A.P., the first term is 22, n t h term is -11 and the sum to first n terms is 66. Find n and d , the common difference.

If the sum of n terms of an A.P.be 3n^(2)-n and its common difference is 6, then its first term is 2 b.3 c.1 d.4

The sum of n terms of an A.P. is (n^(2)+5n). Its common difference is :

The sum of n terms of an A.P. is (n^(2)+5n). Its common difference is :

The sum of the n terms of an AP is 2n^2+5n and its common difference is 6, then its first term is