College Algebra (6th Edition)

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

Chapter 4 - Exponential and Logarithmic Functions - Exercise Set 4.2 - Page 468: 140

Answer

False (change the LHS to make it true) $\log(0.01)=-2$

Work Step by Step

As it stands, the LHS is undefined, because the domain of a logarithmic function of the form $f(x)=\log_{b}x$ is the set of all POSITIVE real numbers. So, the statement is false. Let's change $-100$ to make it true. Use the definition (p.456), $y=\log_{b}x$ is equivalent to $b^{y}=x$. Here, b=10. $\log x=-2$ is equivalent to $10^{-2}=x$ so, to make the statement true, change $-100$ to 0.01 on the LHS
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