If the `p^(th)` term of an A.P. is `(1)/(q)` and `q^(th)` term is `(1)/( p)`, show that the sum of `pq` terms is `((pq+1) )/(2)`.

In the p^(th) term of an A.P. is q and q^(th) term is p, prove that the n^(th) term is equal to p+q-n.

If mth term of an AP is 1/n and its nth term is 1/m , then show that its (mn)th term is 1

IF m^(th) term of an A.P. is n and n^(th) term is m, then find p^(th) term?

The 10th term of an A.P. is (-4) and the 22nd term is (-16) . Find the 38th term.

If the 9^(th) terms of an A.P is zero , prove that 29^(th) term is double the 19^(th) term .

The sixth term of a H.P is 1/61 and the 10^(th) term is 1/105.then the first term of that H.P is

If the sum of the first n^(th) terms of an A.P is 4n-n^(2) , what is the first term (that is S_(1) ) ? What is the sum of first two terms? What is the second term? Similarly, find the 3^(rd) , the 10^(th) and the n^(th) terms.

If 29th term of an A.P is twice its 19th term, then the 9th term is