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Math Help - Logs- solve for x

  1. #1
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    Jul 2010
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    Logs- solve for x

    I've tried this problem at least 5 times and I still can't get to the right answer

    ln(x+1)-1=ln(x-1)

    I know the correct answer is x=(e+1)/(e-1), I just can't get it.

    Thanks
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  2. #2
    Member
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    Jan 2009
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    145
     ln(x+1) -1 = ln(x -1)

    Combine like terms

     ln(x+1) - ln(x-1) = 1

    Now use the identity that  ln(a) - ln(b) = ln(\frac{a}{b}) .
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  3. #3
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    Jul 2010
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    Oh yes, thank you!

    I had my properties backwards.
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