The first and the last terms of an A.P. are `a\ a n d\ l` respectively. Show that the sum of nth term from the beginning and nth term from the end is `a+ldot`

Prove that the sum of nth term from the beginning and nth term from the end of an A.P. is· constant.

If the first, second and the last terms of an A.P. are a,b,c respectively, then the sum of the A.P. is

The first and last term of an A.P. are a and l respectively. If S be the sum of all the terms of the A.P., them the common difference is

The first and the last terms of an A.P. are 34 and 700 respectively. If the common difference is 18, how many terms are there and what is their sum?

The first term, second term and middle term of an A.P. are a, b and c respectively. The sum of this A.P. is :

If an A.P. consists of n terms with first term a and n^(th) term l then show that the sum of the m^(th) term from the beginning and the m^(th) term from the end is (a+l) .

The first and the last terms of an A.P. are 4 and 81 respectively . If the common difference is 7, how many terms are there in the A.P. and what is their sum?

The first and last terms of an A.P. are 1 and 7 . If the sum of its terms is 36 , then the number of terms will be

If the first and the nth term of a G.P. are a and b, respectively, and if P is the product of n terms , prove that P^(2)=(ab)^(n) .

If the first and the nth terms of a GP are a and b respectively and if P is the product of the first n terms, then P^(2) is equal to