Math  /  Algebra

QuestionThe function f(x)=x33f(x)=x^{3}-3 is one-to-one. a. Find an equation for f1\mathrm{f}^{-1}, the inverse function. b. Verify that your equation is correct by showing that f(f1(x))=xf\left(f^{-1}(x)\right)=x and f1(f(x))=xf^{-1}(f(x))=x. a. Select the correct choice below and fill in the answer box(es) to complete your choice. (Simplify your answer. Use integers or fractions for any numbers in the expression.) A. f1(x)=f^{-1}(x)= \square , for xx \geq \square B. f1(x)=x+33f^{-1}(x)=\sqrt[3]{x+3}, for all xx C. f1(x)=f^{-1}(x)= \square , for x\mathrm{x} \leq \square D. f1(x)=f^{-1}(x)= \square , for xx \neq \square b. Verify that the equation is correct. f(f1(x))=ff\left(f^{-1}(x)\right)=f \square f1(f(x))=f1()=\begin{aligned} f^{-1}(f(x)) & =f^{-1}(\square) \\ & =\square \end{aligned} and f1(f(x))==\quad \begin{aligned} f^{-1}(f(x)) & = \\ & =\end{aligned}
Substitute. Simplify.

Studdy Solution
Verify that f1(f(x))=x f^{-1}(f(x)) = x :
Substitute f(x)=x33 f(x) = x^3 - 3 into f1(x) f^{-1}(x) :
f1(f(x))=f1(x33) f^{-1}(f(x)) = f^{-1}(x^3 - 3)
=(x33)+33 = \sqrt[3]{(x^3 - 3) + 3}
=x33 = \sqrt[3]{x^3}
=x = x
This confirms that f1(f(x))=x f^{-1}(f(x)) = x .
The correct choice is B: f1(x)=x+33 f^{-1}(x) = \sqrt[3]{x + 3} , for all x x .

View Full Solution - Free
Was this helpful?

Studdy solves anything!

banner

Start learning now

Download Studdy AI Tutor now. Learn with ease and get all help you need to be successful at school.

ParentsInfluencer programContactPolicyTerms
TwitterInstagramFacebookTikTokDiscord