The sums of n terms of two arithmetic series are in the ratio 2n+3:6n+5,then the ratio of their 13th terms is--- Share with your friends Share 0 Brijendra Pal answered this Hi, refer the similar link:https://www.meritnation.com/ask-answer/question/the-sum-of-n-terms-of-two-arithmetic-progressions-are-in/math/9736777 0 View Full Answer