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Math Help - Please Help With This Problem

  1. #1
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    Please Help With This Problem

    Find f '(x) and f "(x) if : f(x) = x

    x




    Not sure how to do this any help would be appreciated.
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  2. #2
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    Quote Originally Posted by The Math Man View Post
    Find f '(x) and f "(x) if : f(x) = x

    x




    Not sure how to do this any help would be appreciated.
    f(x) = \frac{\ln{x}}{x}

    quotient rule ...

    f'(x) = \frac{x \cdot \frac{1}{x} - \ln{x} \cdot 1}{x^2}

    clean it up, and use the quotient rule again to find f''(x)
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