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Let $\displaystyle f(x) = 8x^{4}-7x^{2}+6$ .

(a) Find $f'(x)$ .

$f'(x)$ =

(b) Find the slope of the line tangent to the graph of $f$ at $x = 2$ .

Slope at $x = 2$ :

(c) Find an equation of the line tangent to the graph of $f$ at $x = 2$ .

Tangent line: $y$ =

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