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Thread: solving logarithm/exponential equations

  1. #1
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    solving logarithm/exponential equations

    I've come across a couple log equations in which I'm having trouble solving for x. Any help will be appreciated

    a: 3e^(-x+1) = 5 -x^2

    b: ln(.5x)=.2 - e^x
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  2. #2
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    Re: solving logarithm/exponential equations

    Elementary algebraic methods will not yield exact, closed-form solution(s) for either of these equations ... you'll have to resort to numerical methods to approximate them.

    $3e^{1-x} = 5-x^2$

    Wolfram|Alpha: Computational Knowledge Engine

    $\ln(x/2) = 0.2-e^x$

    Wolfram|Alpha: Computational Knowledge Engine
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