In an `A.P.`, th e sum of its first n terms is `6n -n^2`. Find its 25th term.

In an A.P., the sum of first n terms is (3n^2)/2+(5n)/2dot Find its 25th term.

In an A.P.,the sum of first n terms is 3n^2/2+5n/2 .Find its 25th term.Also determine its first term and C.D.

In an A.P., the sum of first n terms is (3n^2)/2+(13)/2n . Find its 25 t h term.

In an A.P.,the sum of first n terms is 5n^2/2+3n/2 .Find its 20th term.

In an A.P.the sum of first n terms is (3n^(2))/(2)+(13)/(2)n. Find its 25th term.

In an A.P.the sum of first n terms is (3n^(2))/(2)+(5n)/(2). Find its 25 th term.

The sum of first n terms of an AP is 4n^(2)+2n Find its n th term.

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

The sum of n terms of an A.P. is n^(2) + 3n . Find its 20th term.