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![[Post New]](/templates/default/images/icon_minipost_new.gif) 16 Jan 2008 18:30:06 IST
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See this solution by Sprinkle.........brilliant dude......simply awesome solution......
http://www.goiit.com/posts/list/algebra-how-to-find-the-sum-of-series-38498.htm#189470
only diff is that u have to take here:
r(r+1)(r+2)(r+3)(r+4) = (1/6) ( r(r+1)(r+2)(r+3)(r+4)(r+5) - (r-1)r(r+1)(r+2)(r+3)(r+4) )
and then proceed like what sprinkle has done.
millions of thanks to Sprinkle!!!
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