Questions about the world of GMAT Math from other sources and general math related questions.
sarathsasikumar
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Summation of series

by sarathsasikumar Mon Jan 25, 2010 11:59 am

General question on series summation.

How does one go about summing up a series like 1/(n+1) (say n=25 to 50) ?

What if it were 1/(n+1)^2 ?

Navjot...I hope you read this. You could probably solve this in seconds. :-)
RonPurewal
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Re: Summation of series

by RonPurewal Sat Jan 30, 2010 8:41 am

heh. don't hold your breath.

there is definitely NOT a simple formula for either of these sums.

as for the first one, even Leonhard Euler, the greatest mathematician of all time, could only muster a strange-looking approximation:
http://www.umass.edu/wsp/statistics/math/euler.html

as for the second one, that's not much better. in fact, if you can produce a reliable formula for things like that, then you're well on your way to winning a million dollars. seriously. (click the link for details)