In Exercises 39-44, each function f(x) changes value when x changes from x, to xo + dx. Find a. the change Af = f(xo + dr) – f(x); b. the value of the estimate df = f'(x) dx; and %3D c. the approximation error |Af - df|. y = f(x)/ Af = f(x, + dr) –f(x) (Xo. f(ro)) df = f'(xo) dx dx Tangent line Xo + dr

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