Which one of the following function is not invertible? - Vidyadip

MCQ

Which one of the following function is not invertible?

A
$\text{f} : \text{R} \rightarrow \text{R}, \text{f(x)} = 3\text{x} + 1$
B
$\text{f} : \text{R} \rightarrow [0,\infty), \text{f(x)} = \text{x}^2$
C
$\text{f} : \text{R}^+\rightarrow\text{R}^+, \text{f(x)} =\frac{1}{\text{x}^3}$
✓
None of these.

✓

Answer

Correct option: D.

None of these.

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