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I'm facing one differentiation question which is it asks me to show that $\frac{d}{dx}x^{\frac{1}{4}}=-\frac{1}{4}x^{-\frac{3}{4}}$.

My attempt,

I differentiated so it becomes $\frac{1}{4x^{\frac{3}{4}}}$. Why my answer is not with the question given? Can anyone explain this to me ? Thanks in advance.

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    The answer you have given seems to be correct. Where does the extra minus sign come from is beyond me. – 2017-01-26
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    $\frac {1}{x^n} = x^{-n} \implies \frac{1}{4x^{\frac{3}{4}}} = \frac{1}{4}x^{-\frac{3}{4}}$ There is a minus sign that does not belong in what you have been asked to show. – 2017-01-26
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    Reminds me of an assignment in complex calculus that had an erroneous negative sign, and half the class "proved" it anyway. You are right. The negative sign is likely a typo. – 2017-01-26

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