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posted by Allison Sunday, October 2, 2011 at 7:15pm.

Take the derivative of f(x) = 4x^3+(7/x^2).

f = 4x^3 + 7x^-2 f' = 4*3*x^2 + 7(-2)x^-3 = 12x^2 - 14/x^3

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