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

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

The nth term of an AP is (3n +5). Find its common difference.

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

The sum of the first n terms (n>1) of an AP is 153 and the common difference is 2. If the first term is an integer,then what is the number of possible values of n.

The 5th term of an AP is -3 and its common difference is -4. The sum of its first 10 terms is

The nth term of an AP is 5n+ 2. Find the common difference.

The nth term of an AP is (7-4n). Find its common difference.

If gerneral term of an A.P. is 2n + 5 , then its common difference is