Let $f : R \rightarrow R$ be defined as $f(x) = 2x - 1$ and $g : R - \{1\} \rightarrow R$ be defined as $g(x) = \frac { x - \frac { 1 } { 2 } } { x - 1 }$. Then the composition function $f(g(x))$ is:\\
(1) neither one-one nor onto\\
(2) onto but not one-one\\
(3) both one-one and onto\\
(4) one-one but not onto