Selection of terms in an AP

If 2 and 31 appear as two terms in an AP,then which is in correct (A) common difference of the AP is a rational number (B) all the terms of the AP must be rational (C) all the terms of the AP must be integer (D) all the terms of the number of terms of the AP must be rational

The first and last terms of an A.P. are - 7 and 233 and the sum of the A.P. is 9153. Find the number of terms in the A.P.:

In an A.P.the sum of m terms of an AP is n and sum of n terms of AP is m,then prove that sum of (m+n) terms of AP is -(m+n)

If the sum of 4 terms of an AP is 36, then AM of the AP is:

General term of an AP

If the sum of first 75 terms of an AP is 2625, then the 38th term of an AP is

If the sum of the first four terms of an AP is 40 and the sum of the first fourteen terms of an AP is 280. Find the sum of first n terms of the A.P.

The sum of the first five terms of an AP and the sum of the first seven terms of theits first twenty terms.same AP is 167. If the sum of the first ten terms of this AP is 235, find the sum of first twenty terms

The sum of the first five terms of an A.P. and the sum of the first seven terms of the same A.P. is 167. If the sum of first 10 terms of this A.P. is 235, find the sum of its first twenty terms.

The sum of the first five terms of an AP and the sum of the first seven terms of the same AP is 167. If the sum first ten terms of this AP is 235, find the sum of its first twenty terms.