Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 4 - Exponential and Logarithmic Functions - Section 4.6 Logarithmic and Exponential Equations - 4.6 Assess Your Understanding - Page 338: 84

Answer

$1$

Work Step by Step

1. $log_2(x+1)-log_4(x)=1 \Longrightarrow \frac{log(x+1)}{log2}-\frac{log(x)}{log4}=1 \Longrightarrow \frac{log(x+1)}{log2}-\frac{log(x)}{2log2}=1\Longrightarrow 2log(x+1)-log(x)=2log2 \Longrightarrow (x+1)^2=4x \Longrightarrow x^2-2x+1=0 \Longrightarrow x=1 $ 2. Check, $x=1$ fit.
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