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Derivative of:

  1. Aug 4, 2010 #1
    1. The problem statement, all variables and given/known data

    I think it was: 3ln5x

    2. Relevant equations

    3. The attempt at a solution

    I just took it on a test. My professor said it was 3/x but I don't see how you get that?

    When you get the integral of 3/x how do you get the 3ln5x? Where does the 5 go? I don't understand :(
  2. jcsd
  3. Aug 4, 2010 #2


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    It is 3/x if you mean to differentiate 3*ln(5*x). There are a couple of different ways to do this. i) use the chain rule, or ii) use the properties of logs before you differentiate.
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