The sum of first 9 terms of an A.P. is 162. The ratio of its 6th term to its 13th term is `1:2` . Find the first and `15 t h` term of the A.P.

The sum of first six terms of an A.P.is 42. The ratio of its 10 th term to its 30 th term is 1:3. Find the first term of the A.P.

The sum of first six terms of an AP.is 42. The ratio of its 10^(th) term to its 30^(th) term is 1:3 . Find the first term of the A.P.

The sum of first six terms of an A.P. is 42. The ratio of its 10th term to 30th term is 1 : 3. Calculate the first and 13th term of the A.P.

The sum of the first six terms of an A.P. is 42. The ratio of the 10th term to the 30th term of A.P. is 1/3 Find the 40th term of the A.P.:

The sum of first 6 terms of an arithmetic progression is 42. The ratio of its 10th term to its 30th term is 1:3 . Calculate the first and 13th term of an AP.

The sum of first 6 terms of an arithmetic progression is 42. The ratio of its 10 th term to its 30 th term is 1:3. Calculate the first and 13 th term of an AP.

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

The sum of first 15 terms of an A.P. is 750 and its first term is 15. Find its 20th term.

The sum of first six terms of an arithmetic progression is 42. The ratio of its 10th term to its 30th term is 1:3. Calculate the first and the thirteenth term of the A.P.

The sum of the first 30 terms of an A.P. is 1920. if the fourth term is 18, find its 11^(th) term.