If \[f(x)=\left\{ \begin{matrix} x-1,\,\,\,\,\,\,\,x

1.	If \[f(x)=\left\{ \begin{matrix} x-1,\,\,\,\,\,\,\,x
A.	\[f(\left\| x \right\|)\]is discontinuous at x=0
B.	\[f(\left\| x \right\|)\]is differentiable at x=0
C.	\[\|f(x)\|\]is non-differentiable at x=0, 2
D.	\[\|f(x)\|\]is continuous at x=0
Answer» D. \[\|f(x)\|\]is continuous at x=0

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If \[f(x)=\left\{ \begin{matrix} x-1,\,\,\,\,\,\,\,x

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