calculus problem for daughter – Khan Academy Help Center - Dutch (BETA)

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Dennis Walsh

6 juni 2016 23:25
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Will someone show their work to get to answer. It has been 30 years for me.

f ( x + Delta x ) - f ( x )

___________________

Delta x

lim

x-> 0

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Marc-Antoine Ouimet

23 juni 2016 01:56
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That limit is the definition of a derivative.

Here's an example with f(x)=4x^2:

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