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Homework Help: Derivative of a natural log

  1. Mar 22, 2015 #1
    1. The problem statement, all variables and given/known data
    I posted a picture of it and my attempt it is number 3

    2. Relevant equations

    3. The attempt at a solution
    I tried using log properties and I am not sure what went wrong and how to arrive at the correct answer.

    Mod note: Messy, disorganized image deleted.
    Last edited by a moderator: Mar 22, 2015
  2. jcsd
  3. Mar 22, 2015 #2
    log derivative and chain rule should get you there.
  4. Mar 22, 2015 #3


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    Staff Emeritus
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    You need to brush up on your algebra. ##\sqrt[3]{x}## doesn't mean ##(\sqrt{x})^3##; it means ##x^{1/3}##. Try again.
  5. Mar 22, 2015 #4


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    Staff Emeritus
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    If you must post your attempt at a solution in handwritten form, at least use a clean sheet of paper and present your work in some logical sequence so that others can follow it. o_O
  6. Mar 22, 2015 #5


    Staff: Mentor

    The image you posted was so bad that I deleted it. Please post the problem you want help on (not an image), together with your work.
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