Find the arithmetic progressionof 6 terms whose first term is `2/3` and the last term is `(22)/3`

Find the arithmetic series of n terms whose first term is a and last term is l.

Find S_oo of G.P. whose first term is 28 and the fourth term is 4/49 .

How many arithmetic progressions with 10 terms are there whose first term is in the set {1, 2, 3} and whose common difference is in the set {2, 3, 4} ?

Find the sum of an A.P. of :- 26 terms whose nth term is (2n + 1)/3 .

Find the sum of 32 terms of an A.P. whose third term is 1 and the 6th term is -11.

Find the first six terms of the sequence whose first term is 1 and whose (n+1)th term is obtained by adding n to the nth term.

Find the sum of 40 terms of an A.P. whose third term is 1 and 6th term is - 11.

Prove that the product of first 'n' terms of a G.P., whose first term is ‘a’ and last term is ‘l’ , is (al)^(n/2) .

If the arithmetic progression whose common difference is nonzero the sum of first 3n terms is equal to the sum of next n terms. Then, find the ratio of the sum of the 2n terms to the sum of next 2n terms.

Find the second term and nth term of an A.P. whose 6th term is 12 and 8th term is 22.