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Homework Help: Quickly Check my Work Please|Finding Derivatives

  1. Feb 15, 2007 #1
    1. The problem statement, all variables and given/known data

    Find y'.

    2. The attempt at a solution




    The 4x2 gets cancelled out.



    Did I do it right?
    Last edited: Feb 15, 2007
  2. jcsd
  3. Feb 15, 2007 #2

    edit: The second and third terms in the numerator (of the final result) needs some corrections.
    Last edited: Feb 15, 2007
  4. Feb 15, 2007 #3
    Thank you very much!
  5. Feb 15, 2007 #4
    Rather than using the quotient rule, it would be quicker to simplify the original expression...


    [tex]= 2x - \frac{5}{4} x^{-1} - \frac{1}{2}x^{-3}[/tex]

    Then, take the derivative. The form of the answer won't be the same as what you have, but it'll be equivalent.
    Last edited: Feb 15, 2007
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