Let \[f(x)=\left\{ \begin{matrix} 0, & x

1.	Let \[f(x)=\left\{ \begin{matrix} 0, & x
A.	f is continuous but not differentiable
B.	f is differentiable but not continuous
C.	\[{f}'\] is continuous but not differentiable
D.	\[{f}'\] is continuous and differentiable
Answer» D. \[{f}'\] is continuous and differentiable

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Let \[f(x)=\left\{ \begin{matrix} 0, & x

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