$\"\"$

The function is $\"\"$ .

One-to-one function:

A function is one-to-one if any two different inputs in the domain correspond to two different outputs in the range.

If $\"\"$ and $\"\"$ are two different inputs of a function $\"\"$ , then $\"\"$ is one-to-one if $\"\"$ .

The elements in the domain are $\"\"$ .

The elements in the range are $\"\"$ .

Observe the domain and range of the function, the element $\"\"$ in the range is mapped with two different elements in the domain that is $\"\"$ and $\"\"$ .

So the function is not a one to one function.

$\"\"$

The function $\"\"$ is not one to one function.