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 .

                ()

is undefined.

or               ()

or                    ()

                        ()

is undefined.

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

or , or .

Therefore .

The solutions are is undefined and .