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Math Help - Differentiation - I thought I had finally got it, but im stuck again!

  1. #1
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    Angry Differentiation - I thought I had finally got it, but im stuck again!

    Ok, the question is:

    Differentiate: five over the square root of four + x
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  2. #2
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    Re: Differentiation - I thought I had finally got it, but im stuck again!

    \frac{5}{\sqrt{4+x}}=5(4+x)^{-1/2}

    Use the chain rule.
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  3. #3
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    Re: Differentiation - I thought I had finally got it, but im stuck again!

    thanks, i got that far. But its after that that I get lost.
    The answer says -5 over 2 times the square root of 4 + x cubed

    thankyou!
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