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Math Help - Prove this sum

  1. #1
    MHF Contributor
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    Prove this sum

    Prove that

     <br />
\sum^{n}_{r=1}(1+r^2)r!=n(n+1)!<br />
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  2. #2
    Newbie geld's Avatar
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    Mathematical induction, my favourite.
    Attached Thumbnails Attached Thumbnails Prove this sum-cci00000.png  
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  3. #3
    MHF Contributor
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    Thanks . Is it possible to do it besides using induction .
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