An A.P., and a H.P. have the same first and last terms and the same odd number of terms. The middle terms of the three series are in

An AP, GP , HP have same first and last term and same odd number of terms .middle term of three series are in

an A.P. a G.P. and a H.P. have the same first term & the same last term and the same odd numberof terms . Middle terms of 3 series are in

If a and l are first and last terms of an A.P. then the number of terms is ….

In a A.P & an H.P have the same first term, the same last term & the same number of terms; prove that the product of the r^(th) term from the beginning in one series & the r^(th) term from the end in the other is independent of r.

Let an A.P. a G.P. and a H.P. of positive terms have the same first term a, the same last term b and the same numberof terms (2n+1). Let x,y,z be the (n+1)th terms respectively of the A.P., G.P. and H.P. respectively. On the basis of above information anwer the following question: x,y,z are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

The first and last term of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be

The sum of four consecutive numbers in A.P. is 32 and the ratio of the product of the first and last term to the product of two middle terms is 7:15. Find the number