Re: Recursion problem in SymbolicSum

*To*: mathgroup at smc.vnet.net*Subject*: [mg60697] Re: Recursion problem in SymbolicSum*From*: "Alexander" <beginning.physst at mail.ru>*Date*: Sun, 25 Sep 2005 02:36:08 -0400 (EDT)*References*: <dh2u72$dcl$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hello! You should use function NSum instead of Sum. So here is correct answer: In[7]= NSum[PoissonProb[1.05, k] (k + 1 - 9)/(k + 1), {k, 9, Infinity}] Out[7]= `1.8235341173063736`*^-7 Alexander.