The sum of first 7 terms of an A.P. is 10 and that of next 7 terms is 167. Find the progression.

The sum of the first 7 terms of an AP is 63 and the sum of its next 7 terms is 161. Find the 28 th term of this AP.

If the sum of first 7 terms of an A.P. is 49 and that of its 17 terms is 289, find the sum of first n terms of the A.P.

If the sum of first 7 terms of an A.P. is 49 and that of 17 terms is 289, find the sum of first n terms.

In a geometric prograssion the sum of first 3 terms is 7 and the sum of next 3 terms is 56 . Find the geometric prograssion.

If the sum of first 7 terms of an A.P is 49 and that of its first 17 terms is 289, find the sum of first n terms of the A.P

If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n terms.

The sum of the first fifteen terms of an A.P. is 105 and the sum of the next fifteen terms is 780. Find the common difference of A.P.:

If the sum of first 10 terms of an A.P is 60 and sum of first 15 terms is -165 then find the sum of its n terms