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Jane:
Elegant solution, the part where you made the reciprocated even squares 1/4 of the reciprocated integer squares was a surprise. Did you just look at it and say, "Ah, this must be 1/4 of that?", or did you have to think hard about it... I would never have guessed... thanks anyhow.
Zhylliolom:
Very nice... getting technical! I understood all of it except the root finding factorisation and the original series.
Hi, this could be a hard question:
In the 18th century, Euler proved the remarkable fact that:
Use this to determine the value of:
Thanks, if you can't help directly then please give me some additional info from links.