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Math Help - equation involving n factorial

  1. #1
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    dfsdfdf
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    equation involving n factorial

    Dear Sir
    I would appreciate very much if you can
    help me with the below question.
    Thanks very much
    Kingman


    find n if
    n ! = 3 to the power of 2007

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  2. #2
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    Quote Originally Posted by kingman View Post
    Dear Sir
    I would appreciate very much if you can
    help me with the below question.
    Thanks very much
    Kingman


    find n if
    n ! = 3 to the power of 2007



    Did you mean n!=3^{2007} ? Then don't worry: it has no soution since any factorial with n\geq 2 must be even...

    Tonio
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  3. #3
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    65
    3^2007 ends with an odd digit.
    5! = 120; if n>4, last digit always 0.
    Are you sure you got that problem correct?
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  4. #4
    Member
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    Apr 2010
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    dfsdfdf
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    Thanks for the prompt reply

    i can see that there is something wrong with the question and i will check on it.
    thanks
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