College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 2 - Functions and Graphs - Concept and Vocabulary Check - Page 223: 5



Work Step by Step

$y=\frac{+}{-}\sqrt {x^2-1}$ does not define $y$ as a function of $x$, as the plus/minus sign in front of the square root signifies that in many occasions two values of the range will correspond to any single value of the domain.
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