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Find derivative of composite function

  1. May 11, 2016 #1
    1. The problem statement, all variables and given/known data

    Consider the equation z=6x8ln(x) where z and x are functions of t.If dx/dt=5 when x=e calculate dz/dt.

    2. Relevant equations

    Do I have to rearrange the equation to do this?


    3. The attempt at a solution
     
  2. jcsd
  3. May 11, 2016 #2

    haruspex

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    Not sure what the 6x8 means. Is it 6 times 8? 6x8?
     
  4. May 11, 2016 #3
    its 6x^8
     
  5. May 11, 2016 #4

    Ray Vickson

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    It is for problems like this one that the chain rule was invented.
     
  6. May 11, 2016 #5

    epenguin

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    At some point you will have to work out what (ln e) is. Possibly go back to basics and remind yourself what ln aka loge means.
     
    Last edited: May 11, 2016
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