NDA || Mathematics || Algebra || Arithmetic Progression || Quiz

Find 10^th term of A.P. whose

If the ratio of the sum of the first seven terms to the sum of the first eleven terms is 6 : 11 and the 7^th term lies in between 130 and 140 then find the first term of the A.P. It is also provided that all the terms of this A.P. are natural numbers.

Let  denote the sum of first n terms of an A.P. If  , then the ratio  is equal to:

If the sum of m terms of an AP is n and the sum of n terms is m, then the sum of (m + n) terms is

The fifth term of an (AP) of n terms, whose sum is , is