If `nth` term of an `A.P.` is `(2n+1),` what is the sum of its first three terms?

If n^(th) term of an A.P. is (2n + 1), what is the sum of its first three terms ?

If the nth term of an AP is (2n +1) then the sum of its first three terms is

The nth term of an A.P. is (5n-1). Find the sum of its 'n' terms.

The nth term of an A.P. is (5n-1). Find the sum of its 'n' terms.

The nth term of an A.P. is p, show that, the sum of its first (2n-1) terms is (2n-1)p.

If the nth term of an A.P. is t_(n) =3 -5n , then the sum of the first n terms is ………

If the n^(t h) term of an A.P. is (2n+1), find the sum of first n terms of the A.P.

The sum of first p terms of an A.P. is (p^(2))/(n) and the sum of its first q(!= p) terms is (q^(2))/(n) . Show that the sum of its first n terms will be n.

If the n^(th) term of an A.P.is (2n+1), find the sum of first n terms of the A.P.