If \[f(x)=\left\{ \begin{matrix} {{x}^{3}}+1,x

1.	If \[f(x)=\left\{ \begin{matrix} {{x}^{3}}+1,x
A.	\[x,\forall x\in R\]
B.	\[x-1,\forall x\in R\]
C.	\[x+1,\forall x\in R\]
D.	None of these
Answer» B. \[x-1,\forall x\in R\]

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If \[f(x)=\left\{ \begin{matrix} {{x}^{3}}+1,x

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