The function \( f(x)=x^{3}-27 x+8 \) is increasing when (a) \( |x|3...

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The function \( f(x)=x^{3}-27 x+8 \) is increasing when
(a) \( |x|3 \)
(b) \( |x|3 \)
(c) \( -3x3 \)
(d) none of these
\( \mathrm{P} \)
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