Which of the following function is thrice differentiable at \( x=0 ...

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Which of the following function is thrice differentiable at \( x=0 \) ?
\( \mathrm{P} \)
(1) \( f(x)=\left|x^{3}\right| \)
(2) \( f(x)=x^{3}|x| \)
W
(3) \( f(x)=|x| \sin ^{3} x \)
(4) \( f(x)=x\left|\tan ^{3} x\right| \)
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