If the sum of the first 2n terms of the `A.P.2,5,8,…,` is equal to the sum of the first n terms of the `A.P.57,59,61,…,` then n equals

If the sum of the first 2n terms of the A.P.2,5,8,..., is equal to the sum of the first n terms of A.P.57,59,61,..., then n equals 10 b.12 c.11 d.13

If the sum of the first 2n terms of the AP 2, 5, 8 ....is equal to the sum of first n terms of the AP 57, 59, 61, ..., then what is the value of n?

If the sum to 2n terms of an Ap 2,5,8,11 , …. is equal to the sum to n terms of an AP 57,59,61,63, …. , then n is equal to

Let S_(1) be the sum of the first n terms of the A.P 8,12,16,... and let S_(2) be the sum of the first n terms of the A.P 17,19,21,... assume n!=0 then S_(1)=S_(2) for

If the sum of first p terms of an A.P. is equal to the sum of the first q terms, then find the sum of the first (p+q) terms.

The sum oif the first ten terms of an A.P. is equal to 155, and the sum of the first two terms of a G.P. is 9. Find these progressionsif the first term of the A.P. equals the common ratio of the G.P. and the 1st term of G.P. equals the common difference of A.P.

If sum of first 20 terms of an A.P. is equal to sum of first 30 terms of the A.P. then sum of the first 50 terms of the A.P. is

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

The sum of first 5 terms and first 15 terms of an A.P. are equal. Find the sum of its first 20 terms.