Differentiate w.r.t.x: $y = 6 x^{4} - 5 x^{3} - 4 x^{2}$

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Solution

$y = 6 x^{4} - 5 x^{3} - 4 x^{2}$
$\frac{d y}{d x} = 6 (4) x^{3} - 5 (3) x^{2} - 4 (2) x$
$= 24 x^{3} - 15 x^{2} - 6 x$

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