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Math Help - deriviative using log rules

  1. #1
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    deriviative using log rules

    I am having some trouble remembering how to work out derivative using log rules.

    How would I solve the following

    d/dx (ln x^4 / x^5+1)
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  2. #2
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    Quote Originally Posted by gammaman View Post
    I am having some trouble remembering how to work out derivative using log rules.

    How would I solve the following

    d/dx (ln x^4 / x^5+1)
    Well, a "log rule" you could use is that ln(x^4)= 4 ln x. You want to differentiate 4 ln(x)/(x^5+1) using the quotient rule and the fact that the derivative of ln(x) is 1/x.
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  3. #3
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    Ok so what would the answer be. (By the way, I am supposed to use the rules for "The Natural Log").
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