Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 1 - Foundations for Algebra - 1-6 Multiplying and Dividing Real Numbers - Practice and Problem-Solving Exercises: 66

Answer

Never

Work Step by Step

The reciprocal of a number always has the same sign as the number (the opposite reciprocal, however, does not). Consequently, both the reciprocal and the original number must have the same sign. Because a positive times a positive or a negative times a negative is always positive, a number times its reciprocal will never be -1.
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