how do you approximate the differential of a square root? for example the square root of 23, something thats not as obvious.
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Originally Posted by ayarfal40 how do you approximate the differential of a square root? for example the square root of 23, something thats not as obvious. $\displaystyle f(x + h) \approx f(x) + h f'(x)$. For the example you give, $\displaystyle f(x) = \sqrt{x}$, $\displaystyle x = 25$ and $\displaystyle h = -2$.
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