The functions are and .

Find .

Apply composition of functions formula: .

To find , evaluate , first. Then use the range as the domain of and evaluate .

                            ()

is undefined.

                        ()

is undefined.

                          ()

is undefined.

                         ()

is undefined.

Because and are not in the domain of , is undefined for and .

Therefore, is undefined.

Find .

Apply composition of functions formula: .

To find , evaluate first. Then use the range as the domain of and evaluate .

or              ()

or                   ()

or           ()

or               ()

Therefore, .

The solutions are is undefined and .