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-   -   Logarithmic Function and its Derivative (https://www.askmehelpdesk.com/showthread.php?t=380650)

  • Jul 28, 2009, 02:10 AM
    ri0t
    Logarithmic Function and its Derivative
    This is a question from my maths book:

    Take Logarithms of both sides and use the log laws to differentiate

    (a) y=x^x

    for this I did:

    log y =x log x

    then I do not know how to go on from there. I know that the derivative of log x is 1/x
  • Jul 28, 2009, 06:37 AM
    galactus
    Take ln of both sides:



    Property of logs:



    Differentiate:



    Solve for y':



    Remember that and sub in:


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