If you have a sequence which is not geometric or arithmetic, is there any methodology to follow in order to have a formula for its sum ?
Take for example the following sequence: {0.921(n−i+1)(i+n)}i=1n. It is not a geometric or an arithmetic progression. I don't see how to split it into sums of sequences which are arithmetic or geometric. Is there any hints I can get to proceed with writing a formula for this sum ?
Sn=i=1∑n0.921(n−i+1)(i+n)
Take for example the following sequence: {0.921(n−i+1)(i+n)}i=1n. It is not a geometric or an arithmetic progression. I don't see how to split it into sums of sequences which are arithmetic or geometric. Is there any hints I can get to proceed with writing a formula for this sum ?
Sn=i=1∑n0.921(n−i+1)(i+n)
Last edited by a moderator: