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Homework Help: Find the solution of this ln equation

  1. Feb 10, 2009 #1
    find the solution of this ln equation:
    ax=lnx

    i tried:
    [tex]
    e^{(ax)}=x
    [/tex]
    [tex]
    e^{(ax)}-x=0
    [/tex]

    what to do next??
    i thought of building a taylor series around 0 for ln
    but ln(0) is undefined

    ??
     
    Last edited: Feb 10, 2009
  2. jcsd
  3. Feb 10, 2009 #2
    I'm not entirely sure, but I think such equations must be solved with a numerical method, such as Newton-Rhapson.
     
  4. Feb 10, 2009 #3

    epenguin

    User Avatar
    Homework Helper
    Gold Member

    When there is any solution there are two I think.
     
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