Question

\text { The function } f(x) \text { is such that } f(x)=4 x^{3}+21 x^{2}+36 x-20 \text { (a) Find } f^{\prime}(x) \& f^{\prime \prime}(x) f (1) f "(1) f

(1) Find the equation of the tangent line to the curve at x = 1 Find and classify all critical values

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