The given function f: mathbbR → mathbbR is not ‘onto’ function. Give reason.
The given function $f: \mathbb{R} \to \mathbb{R}$ is not ‘onto’ function. Give reason.
Answer
Answer
Official answer key
Since each line in co-domain of the function parallel to x-axis, doesn't cuts the graph of function at least one point, therefore the $f(x)$ is not an onto function.
