Question

If tue ratio of the sums of first n terms of two A.P.'s is (7n+1):(4n+27),find the ratio of their m terms

Answer 1

Let a1, a2 and d1, d2 be the first terms and common difference of two A.P.'s.

Suppose and denote the sum of n terms of two A.P.'s.



Thus, the ratio of their mth terms is 14m – 6 : 8m + 23.