Thursday, 6 November 2014

calculus - Sum suminftyn=1frac2nleft(n+1right)!



I need find a Telescopic or Geometric Series but I dont know how do that. I tried everything but nothing work. help me please



n=12n(n+1)!


Answer



We have n=12n(n+1)!=2n=1(n+1)1(n+1)!=2n=1(1n!1(n+1)!)


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