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-   -   What is the formula for (https://www.askmehelpdesk.com/showthread.php?t=770156)

  • Oct 6, 2013, 04:27 AM
    lemon14
    What is the formula for
    1*1! + 2*2! + 3*3! +... +n*n! And how do you get it?
  • Oct 6, 2013, 01:41 PM
    Celine91
    Not sure what you exactly mean ! But refer to this it may help..

    How to prove 1*1!+2*2!+3*3!...n*n!=(n+1)! -1 using mathematical induction? plz help? - Yahoo! Answers

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