\ \

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. \ \

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. \ \

                     () \ \

is undefined. \ \

                     () \ \

is undefined. \ \

           () \ \

. \ \

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

Therefore, or thus . \ \

\ \

The solutions are is undefined and .