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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Jan 2008 22:08:50 IST
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exact proof konichiwa ...................
this sum was given by my iit maths professor............
i was astounded when he gave the proof.
so i just wanted to share this problem with my goiitan friends...........
another simple method to solve this problem is........
the general formula is
2*( (n+1) - n ) < 1/ n < 2*( n - (n-1) )
applying summation from 1 to 106 we get the answer........
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