Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 9 - Sections 9.1-9.6 - Integrated Review - Functions and Properties of Logarithms: 25

Answer

$x=\frac{1}{2}$

Work Step by Step

If $b\gt0$ and $b\ne1$, then $y=log_{b}x$ means $x=b^{y}$ for every $x\gt0$ and every real number $y$. Therefore, $log_{49}7=x$ is equivalent to $49^{x}=7$. We know that $x=\frac{1}{2}$, because $49^{\frac{1}{2}}=\sqrt 49=7$.
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