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Thread: How To Find The Derivative Of These...?

  1. November 12th 2008, 04:10 PM #1
    AlphaRock
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    How To Find The Derivative Of These...?

    We learnt something called the "chain rule" last class.

    I'm doing my best to understand it...

    These are the hardest questions, and I don't know how to start or finish..

    Can anybody show me how to find the derivatives of these:

    1) (sqrt(5x))/(2x^2-3)

    2) f(x) = sqrt(2x(sqrt(x+3)) (Square root of the square root)


    Thanks!
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  2. November 12th 2008, 05:30 PM #2
    Nacho
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    Look this links

    Chain rule whit an example
    http://www.mathhelpforum.com/math-he...tml#post215062

    Then

    <br /> f(x) = \sqrt {2x\sqrt {x + 3} } \Rightarrow f'(x) = \frac{1}<br /> {{2\sqrt {2x\sqrt {x + 3} } }} \cdot \left( {2x\sqrt {x + 3} } \right)^\prime <br />

    Now use the product rule

    P.D: I dont know why the link has name...
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