The sum of n terms of an AP is `3n^2+n`and its common difference is 6,then find its first term.

The sum of n terms of an AP is 3n^(2)+ nand its common difference is 6, then find its first term.

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

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

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

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 to n terms of an A.P. is n^(2) . Find the common difference.

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