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Math Help - Derivative of a square root function ??

  1. #1
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    Question Derivative of a square root function ??

    ok.. I don't have the proper symbols so please bear w/ me...

    If I need to find the derivative of:

    5 √x^2 - 2√x = ?

    Note: 5 is the root it's inside the little V of the sqrt symbol

    What is the derivative?

    I know the first part is x^2/5 but I can't differentiate the second one.

    Please help
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  2. #2
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    f(x) = \sqrt[5]{x^{2}} + 2\sqrt{x}

    Note that: a^{\frac{m}{n}} = \sqrt[n]{a^{m}} = \left(\sqrt[n]{a}\right)^{m}

    We get:
    f(x) = x^{\frac{2}{5}} + 2x^{\frac{1}{2}}

    Now use your power rules as you have learned in your pre-calc days.
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  3. #3
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    Smile Thanks a bunch

    Thank you !!!!
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