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Homework Help: Taking derivative

  1. Jul 20, 2006 #1
    given function f(x) =exp(-x^2)

    is f'(x) = -x^2*exp(-x^2), or

    f'(x) = -x^2*exp(-x^2)*-2x= 2x^3*exp(-x^2)

    just confused what the rules are when taking the derivation of those kind sof function
  2. jcsd
  3. Jul 20, 2006 #2


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    What's wrong with the chain rule?
  4. Jul 20, 2006 #3


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    [tex] f^{\prime}(x) = \frac{d}{dx} \left( e^{-x^2}\right) = e^{-x^2}\frac{d}{dx}\left( -x^2\right) [/tex]

    that's the chain rule step, finish it off.
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