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Math Help - Can anyone show this exponential proof?

  1. #1
    Junior Member
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    Apr 2010
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    Can anyone show this exponential proof?

    Can anyone show the following:

    N^N e^{-N} \leq e^{-1} x N! \leq N x N^N e^{-N}

    N.B. The "x" are multiplication signs
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  2. #2
    Junior Member
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    Apr 2010
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    Use Stirling’s approximation.
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  3. #3
    Junior Member
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    Apr 2010
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    I dont know how to use that? could you show me how its done?
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