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Math Help - Log Issue

  1. #1
    Newbie
    Joined
    Feb 2009
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    2

    Log Issue

    Hi, I am having a hard time solving for t using logarithms.

    Equation is :

    40000 + 2000t = 38500 (1.05)^t

    Any help would be appreciated.

    Thanks!
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  2. #2
    Senior Member I-Think's Avatar
    Joined
    Apr 2009
    Posts
    288
    To solve this algebraically, you have to use the Lambert W function

    Lambert W function - Wikipedia, the free encyclopedia

    Here are some other examples where the Lambert W function is needed.
    http://www.mathhelpforum.com/math-he...-equation.html
    http://www.mathhelpforum.com/math-he...2-x-x-2-a.html
    http://www.mathhelpforum.com/math-he...lving-eqn.html

    Try searching Math Forum for other threads where the Lambert W function is needed.
    Hope this helps. Have fun exploring the world of math.
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  3. #3
    Newbie
    Joined
    Feb 2009
    Posts
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    thanks!
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