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    • Thread Starter

    As you may have guessed, I really don't understand ln...

    So here's another question I don't really get;

    Solve ln(x+3) + ln(x-1) = 0

    Also if anyone could explain the basics of the whole ln thing, then maybe I could do more questions by myself :\

    Thank you!

    have you studied logarithms? because ln is just logarithms to base 'e'
    • PS Helper

    PS Helper
    You should know that \ln A + \ln B = \ln (AB). Apply this rule, and then get rid of the logarithms (remember that \ln A = 0 \Rightarrow A = 1) and solve the resulting quadratic.
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Updated: January 24, 2010

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