You're replying to a comment by Peteris Ledins.

Peteris Ledins Permalink
October 28, 2008, 08:47

I had trouble with the integral method, but this one says why so it:
Basically, to find and upper bound of a sum (from a to b), integrate the f-n from a to b+1 (which makes sense after 2 minutes of looking at those notes).

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