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        riddles >> putnam exam (pure math) >> Another Factorial Sum
        
(Message started by: ThudnBlunder on Feb 15th, 2011, 6:48pm)
Title: Another Factorial Sum
Post by ThudnBlunder on Feb 15th, 2011, 6:48pm
                                                                         
Evaluate n! + (n + 1)!/1! + (n + 2)!/2! + (n + 3)!/3! +........+ (n + m)!/m!
                                         
Title: Re: Another Factorial Sum
Post by JohanC on Nov 25th, 2011, 8:57am

(m+n+1)! / ((n+1)*m!)
Title: Re: Another Factorial Sum
Post by ThudnBlunder on Nov 25th, 2011, 11:31am
Correct.


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