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Math Help - Derivative

  1. #1
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    Derivative

    Could you show me how to find derivative of  f(x)=\dfrac{5}{\sqrt{x}} ?
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    Quote Originally Posted by Bernice View Post
    Could you show me how to find derivative of  f(x)=\dfrac{5}{\sqrt{x}} ?
    Rewrite as f(x)=5x^{-1/2}, and then use the power rule.
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  3. #3
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    Rewrite as f(x)=5x^{-1/2}, and then use the power rule.
    So, will it be: \frac{-5\sqrt{x}}{2x^2}
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  4. #4
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    Yes, but I think it's also acceptable to write it (and generally would more often be written) as -\frac{5}{2x^{\frac{3}{2}}} (although the positioning of the negative sign is irrelevant >.>)
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