If \[f(x)=sgn ({{x}^{3}})\], then [DCE 2001] – McqOptions

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1.	If \[f(x)=sgn ({{x}^{3}})\], then [DCE 2001]
A.	f is continuous but not derivable at \[x=0\]
B.	\[f'({{0}^{+}})=2\]
C.	\[f'({{0}^{-}})=1\]
D.	f is not derivable at \[x=0\]
Answer» E.

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