ALGEBRA 2, 2012
21

 PAGE: 414 SET: Exercises PROBLEM: 21

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 .

TESTIMONIALS
 "I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett "Your site is amazing! It helped me get through Algebra." Charles "My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease
 Tweets by @mathskeydotcom

QUESTIONS? LET US HELP.