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Official 2018 Paper 2 · Q1

Paper 2Functions & graphs

The function ff is given, for x>0x>0, by

f(x)=x3−4x2xf(x)=\frac{x^3-4x}{2\sqrt x}

Find the value of f′(4)f'(4).

A33
B99
C9.59.5
D1212
E39.539.5
F8888

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