If 20th term of an AP is and 40th term of the 40 same AP is then the sum of 800 terms is

If 7th term of an A.P. is 9 and 9th term of the A.P. is 7, then 20th term of the A.P. is

7th term of an A.P. is 40. then the sum of the first 13 terms is

If the p^(th) term if an A.P. is q and the q^(th) term of an A.P is p then the r^(th) term is

7^(th) term of an A.P. is 40. Then, the sum of first 13 terms is

If the third term of an A.P. is 12 and 10th term is 26, then its 20th term is :

3rd term of an A.P. Is 12 and 10th term is 26, then its 20th term is :

The sum of the 4th and the 8th terms of an A.P. is 24 and the sum of the 6th and the 10th terms of the same A.P. is 44. Find the first three terms of the A.P.

Find the 20th term of an A.P. whose 5th term is 15 and the sum of its 3rd and 8th terms is 34.

The sum of the 4 th and 8 th terms of an AP is 24 and the sum of the 6th and 10 th terms is 44. Find the first three terms of the AP.