Find the middle term of the A.P..

The sum of 5^th and 9^th terms of an AP is 30. If its 25^th term is three times its 8^th term, find the AP.

Find where 0 (zero) is a term of the A.P.

If the 5^th term of an A.P. is 31 and 25^th term is 140 more than the 5^th term, find the A.P.

The sum of three terms of an A.P. is 21 and the product of the first and the third terms exceeds these term by 6, find three terms.