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Homework Help: Finding derivative of 1/x^n

  1. Aug 11, 2006 #1
    If you want to take the derivative of [tex]\frac{1}{x^n}[/tex] do you turn it into x^-n and go from there or somhow use the fact that the anti derivative of 1/x is ln x?
     
    Last edited: Aug 11, 2006
  2. jcsd
  3. Aug 11, 2006 #2

    HallsofIvy

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    The fact that "the anti derivative of 1/x is ln x" is irrelevant to the anti-derivative of [itex]\frac{1}{x^n}[/itex]. Write as x-n. Because [itex]\frac{1}{x^n}= x^{-n}[/itex], the anti-derivative of 1 is the anti-derivative of the other.
     
  4. Aug 11, 2006 #3
    Thanks! :smile:
     
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