$\"\"$

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, every element in domain is mapped with different elements in the range.

So the function is said to be one to one function.

$\"\"$

The function $\"\"$ is one to one function.