Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.2 - Negative Exponents and Scientific Notation - Exercise Set: 128

Answer

a. False b. True c. False

Work Step by Step

a. $5^{-1}=0.2$ $5^{-2}=0.04$. So the statement is false. b. $(\frac{1}{5})^{-1}=5$ $(\frac{1}{5})^{-2}=25$. So the statement is true. c. Using part a and b, this is not always true. It is only true when a is less than 1, but false when a is greater than 1. Therefore, this statement is false overall.
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