If \( y=x^{3}-4 x^{2}+5 \) then find \( \frac{d^{2} y}{d x^{2}} \) \( \mathrm{P} \) (1) \( 3 x^{...

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If \( y=x^{3}-4 x^{2}+5 \) then find \( \frac{d^{2} y}{d x^{2}} \)
\( \mathrm{P} \)
(1) \( 3 x^{2}-8 x \)
(2) \( 6 x-8 \)
(3) 6
(4) \( 6 x+8 \)
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