Ex 3: Determine a Derivative using The Limit Definition

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This video determine the derivative of a square root function using the limit definition. It also determines the slope of a tangent line at a given value of x.
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Man, I've got an f(x) with a radical in the denominator. Every time I try to position the h values to be factored out, another numerator becomes 0 too and ruins it. ;-;

kylefrank
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Good example, I was looking for one with a square root equation for f(x). Helped a lot.

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