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Calculating the derivative from mathematical expressions.

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Find the derivative of:

f(x) = sqaure roo 4 / t^3

f(x) = 5 + 2/x + 4/x^2

f(x) = ((4x^3) - 2)/ x^4

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<br>I presume that
<br>f(x) = sqaure root ( 4 / t^3)= ...

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