A) one-one only
B) onto only
C) both one-one and onto
D) neither one-one nor onto
Correct Answer: D
Solution :
The given function is \[f(x)=|x|=\left\{ \begin{matrix} x & x\ge 0 \\ -x & x<0 \\ \end{matrix} \right.\]and\[f:R\to R\]. then it is clear that function is neither one-one nor onto.
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