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Math Help - Statements with ln

  1. #1
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    Statements with ln

    In the following practice example Im confused, I think the first and third are true but I am not sure Im doing it right at all. Confused.


    Which of the following statements is true, or are none of them true?


    ln(x-2) = ln x - ln 2
    ln(x-2) = x - ln 2
    ln(x-2) = ln(x/2) <- x/2 written as fraction
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    Re: Statements with ln

    Quote Originally Posted by itgl72 View Post
    In the following practice example Im confused, I think the first and third are true but I am not sure Im doing it right at all. Confused.


    Which of the following statements is true, or are none of them true?


    ln(x-2) = ln x - ln 2
    ln(x-2) = x - ln 2
    ln(x-2) = ln(x/2) <- x/2 written as fraction
    There are really only two things you can do with logarithms:
    ln(ab) = ln(a) + ln(b)

    ln(a^b) = b \cdot ln(a)

    None of your given answers fits either rule.

    -Dan
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