If \( x=4 t^{3}-2 t+3 \) then find velocity \( \left(v=\frac{d x}{d t}\right) \) at \( t \) P \(...

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If \( x=4 t^{3}-2 t+3 \) then find velocity \( \left(v=\frac{d x}{d t}\right) \) at \( t \)
P
\( =1 \mathrm{sec} \).
W
(1) \( 10 \mathrm{~m} / \mathrm{s} \)
(2) \( 20 \mathrm{~m} / \mathrm{s} \)
(3) \( 8 \mathrm{~m} / \mathrm{s} \)
(4) Zero
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