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.

or                 ()

                     ()

is undefined.

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

Therefore, .

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, .

and .