Let f: R -> N be defined by
\(f\left( x \right) = \;\left\{ {\begin{array}{*{20}{c}} {4x - 1,\;\;if\;x > 0} \\ { - 4x,\;if\;x \leqslant 0} \end{array}} \right.\)
Which of the following is true?
1
f is one- one but not onto
2
f is a bijection
3
f is onto but not one-one
4
f is neither one-one nor onto