^{Ok, the question is: Differentiate: five over the square root of four + x}
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$\displaystyle \frac{5}{\sqrt{4+x}}=5(4+x)^{-1/2}$ Use the chain rule.
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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