25-02-2017
Mathematics

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Let y = 4 \sqrt x.
Find the change in y, \Delta y when x= 4 and \Delta x = 0.2

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25-02-2017

[tex]y = \sqrt{x} \\ \frac{dy}{dx} = \frac{1}{2}x^\frac{-1}{2} \\ x= 4 --\ \textgreater \ \frac{1}{4}\\ x=0.2 ---\ \textgreater \ 1.12[/tex]

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