Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 9 - Section 9.6 - Exponential and Logarithmic Equations; Further Applications - 9.6 Exercises - Page 630: 33

Answer

$x=\dfrac{33}{2}$

Work Step by Step

Since $\log_b y=x$ implies $y=b^x$, the given equation, $ \log_2(2x-1)=5 $, implies \begin{align*}\require{cancel} 2x-1&=2^5 \\ 2x-1&=32 .\end{align*} Using the properties of equality, the equation above is equivalent to \begin{align*}\require{cancel} 2x&=32+1 \\ 2x&=33 \\\\ \dfrac{\cancel{2}x}{\cancel{2}}&=\dfrac{33}{2} \\\\ x&=\dfrac{33}{2} .\end{align*} Hence, the solution to the equation $ \log_2(2x-1)=5 $ is $ x=\dfrac{33}{2} $.
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