Let \( f(x)=x^{3}-6 x^{2}+12 x-3 \). Then at \( x=2, f(x) \) has P ...

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Let \( f(x)=x^{3}-6 x^{2}+12 x-3 \). Then at \( x=2, f(x) \) has
P
(a) a maximum
(b) a minimum
W
(c) both a maximum and a minimum
(d) neither a maximum nor a minimum
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