The `5^(th)` term of an AP is 50. Find the sum of first 9 terms.

if the sum of 12^th and 22^th terms of an AP is 100. Find the sum of first 33 terms.

The 104th term and 4th term of an A.P. are 125 and 0. Find the sum of first 35 terms.

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

The A.P. in which 4^(th) term -15 and 9^(th) term is -30. Find the sum of first 10 numbers.

Find the sum of first n terms of an AP whose n^(th) term is 5-6n .find the sum of its first 20 terms

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

If the sum of first 8 terms of an Arithmetic progression is 136 and that of first 15 terms is 465, then find the sum of first 25 terms. OR Ths sum of the 5th and 9th terms of an A.P. is 40 and the sum of the 8th and 14th term is 64. Find the sum of the first 20 terms.

The ratio of the 11th term to the 18th term of an AP is 2:3 . Find the ratio of the 5th term to the 21st term and also the ratio of the sum of the first five terms to the sum of the first 21 terms.

The ratio of the 11th term to the 18th term of an AP is 2 : 3 . Find the ratio of the 5th term to the 21st term and also the ratio of the sum of the first five terms to the sum of the first 21 terms.