Write the `n t h` term of an A.P. the sum of whose `n` terms is `S_n` .

The nth term of an A.P the sum of whose n term is S_n is____

The n t h term of an A.P., the sum of whose n terms is S_n , is (a) S_n+S_(n-1) (b) S_n-S_(n-1) (c) S_n+S_(n+1) (d) S_n-S_(n+1)

The n t h term of an A.P., the sum of whose n terms is S_n , is S_n+S_(n-1) (b) S_n-S_(n-1) (c) S_n+S_(n+1) (d) S_n-S_(n+1)

Find the rth term of an A.P., the sum of whose first n terms is 3n^2+4n

Find the rth term of an A.P., the sum of whose first n terms is 2n+3n^2 .

Write the common difference of an A.P. the sum of whose first \ \ n terms is P/2n^2+Q n

Find the rth term of an A.P., sum of whose first n terms is 2n + 3n^(2) .

If the 10 t h term of an A.P. is 21 and the sum of its first ten terms is 120, find its n t h term.

The n^(th) term of an A.P is p and the sum of the first n terms is s. The first term 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.