College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Review Exercises - Page 268: 4

Answer

(a) $f(2)=0$ (b) $f(-2)=0$ (c) $f(-x)=\sqrt{x^2-4}$ (d) $-f(x)=-\sqrt{x^2-4}$ (e) $f(x-2)=\sqrt{x^2+4}$ (f) $f(2x)=\sqrt{4x^2-4}$

Work Step by Step

(a) $f(2)=\sqrt{2^2-4}=\sqrt{4-4}=\sqrt0=0$ (b) $f(-2)=\sqrt{(-2)^2-4}=\sqrt{4-4}=\sqrt0=0$ (c) $f(-x)=\sqrt{(-x)^2-4}=\sqrt{x^2-4}$ (d) $-f(x)=-\sqrt{x^2-4}$ (e) $f(x-2)=\sqrt{(x-2)^2-4}=\sqrt{x^2-4x+4-4}=\sqrt{x^2+4}$ (f) $f(2x)=\sqrt{(2x)^2-4}=\sqrt{4x^2-4}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.