Answer
1
Work Step by Step
Recall, the only numbers whose reciprocal is itself are $1$ and $-1$. Note, zero does not count, for its reciprocal has zero in the denominator and is thus undefined.
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 6 - Rational Expressions and Equations - 6.6 Rational Equations - 6.6 Exercise Set - Page 417: 70
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