Find the sum of n terms of the arithmetic-geometric sequence.

If the sum of n-term of an arithmetic progression sequence 25,22,19,... is 116 , then find the last term.

If the sum of second and tenth terms of an arithmetic sequence is equal to 12, then find the sum of fourth, sixth and eighth terms.

(i) The sum of n terms of two arithmetic series are in the ratio of (7n+1)/(4n+27) . Find the ratio of their 11 th terms. (ii) The sum of n terms of arithmetic progressions are in the ratio (3n+8):(7n+15) . Find the ratio of their 12 th terms.

IF the ratio between the sums of n terms of two arithmetic progressions is (7n+1): ( 4n+27), find the ratio of their 11th terms.

The ratio of the sum of n terms of two arithmetic progressions is given by (2n+3) : (5n -7) . Find the ratio of their nth terms.

Find the general (n^(th)) term for the arithmetic sequence : 2,6,10, 14, 18,22,…..

Find the general (n^(th)) term for the arithmetic sequence : -5,-3,-1,1,3,…..

Find the general (n^(th)) term for the arithmetic sequence : 1,4,7,10,13,16,…..

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1+(2)/(3)+

If the sums of n terms of two arithmetic progressions are in the ratio wn+5:3n+4 then write the ratio of their mth term.