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wu :: forums    riddles    putnam exam (pure math) (Moderators: towr, SMQ, william wu, Icarus, Grimbal, Eigenray)    Another Factorial Sum « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: Another Factorial Sum  (Read 7599 times) ThudnBlunder Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Another Factorial Sum   « on: Feb 15th, 2011, 6:48pm » Quote Modify                                                                           Evaluate n! + (n + 1)!/1! + (n + 2)!/2! + (n + 3)!/3! +........+ (n + m)!/m!                                            « Last Edit: Feb 17th, 2011, 3:55pm by ThudnBlunder » IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. JohanC Senior Riddler     Posts: 460 Re: Another Factorial Sum   « Reply #1 on: Nov 25th, 2011, 8:57am » Quote Modify (m+n+1)! / ((n+1)*m!) IP Logged ThudnBlunder Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Another Factorial Sum   « Reply #2 on: Nov 25th, 2011, 11:31am » Quote Modify Correct. IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------  - easy   - medium   - hard   - what am i   - what happened   - microsoft   - cs => putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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