If sum of `n` terms in an A.P is `((5n^2)/2+(3n)/2)` then find its 20th term

If the sum of first n terms of an AP is 1/2 (3n^(2) + 7n) , then find its nth term. Hence write its 20th term.

(i) The sum of the first n terms of an AP is ((5n^(2))/(2) + (3n)/(2)) . Find the nth term and the 20th term of this AP. (ii) The sum of the first n terms of an AP is ((3n^(2))/(2) + (5n)/(2)). Find its nth term and the 25th term.

If the sum of n terms of A.P. is (1)/(2) (3n^(2) + 7n) , find its n^(th) term and write its 25th term.

If for every n in N , sum to n terms of an A.P. is 5n^(2)+7n then is 10th term is

If the sum of n terms of an AP is n^2-2n then find its n^(th) term

(a) The sum of 'n' terms of a progression is n(n + 1). Prove that it is an A..P. Also find its 10th term. (b) The sum of 'n' terms of a progression is (3n^(2) - 5n). Prove that it is an A.P. (c) If the sum of n terms of a series is (5n^(2) + 3n) then find its first five terms.

(a) The sum of 'n' terms of a progression is n(n + 1). Prove that it is an A..P. Also find its 10th term. (b) The sum of 'n' terms of a progression is (3n^(2) - 5n). Prove that it is an A.P. (c) If the sum of n terms of a series is (5n^(2) + 3n) then find its first five terms.

If the sum of the first n terms of an A.P. is 1/2(3n^2+7n) , then find its nth term. Hence write its 20th term.

If the sum of n terms of an A.P is (4n^(2)-3n)/(4) then ,n^(th) term of the A.P

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