# Question #7d077

##### 1 Answer

See below.

#### Explanation:

A function is **one to one** if:

No two elements in the domain map on to the same element in the range.

Since we have a restricted domain, this criteria is met, so **one to one**

For an unrestricted domain **many to one** function.

Inverse of

We need to express

Substituting

Domain of

For

Domain is

Since

Range is:

Domain of

Because the domain of

The range will be the same as the domain of

For one to one functions the range of