6x2 + 12x + 1
6x2 + 6x + 1
6x2 + 6x + 6
6x2 + 12x + 6
Correct answer is D
y = 2x3 + 6x2 + 6x + 1 \(\frac{dy}{dx}\) = 6x2 + 12x + 6
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