find the sum of series : 4+12+20+28+.....+100 Share with your friends Share 0 Rishabh Mittal answered this Dear Student , Here is the link for similar answer to your query : https://www.meritnation.com/ask-answer/question/1-find-the-sum-25-28-31-100/arithmetic-progression/8798115 Hope this information will clear your doubts about the topic . If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible . Regards 1 View Full Answer