Find the sum:
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Originally Posted by PQR Find the sum: Try partial fraction decomposition. See if you can obtain a telescoping sum.
Originally Posted by VonNemo19 Try partial fraction decomposition. See if you can obtain a telescoping sum. I have: Not sure what to do with it, though.
Originally Posted by PQR I have: Not sure what to do with it, though. Actually the problem is tougher than suggested by the first glance. I don't have time now - I will try to reply with some suggestions later if no-one else has done so.
now use and the expansion for the geometric series. Solve the remaining integral. (By the way, the general term changes because the series starts from )
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