Which of the following function is invertible [AMU 2001]

1.	Which of the following function is invertible [AMU 2001]
A.	\[f(x)={{2}^{x}}\]
B.	\[f(x)={{x}^{3}}-x\]
C.	\[f(x)={{x}^{2}}\]
D.	None of these
Answer» B. \[f(x)={{x}^{3}}-x\]

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Which of the following function is invertible [AMU 2001]

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