Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 4 - Section 4.5 - Exponential and Logarithmic Functions - 4.5 Exercises - Page 368: 53

Answer

$x=5$

Work Step by Step

$\log_{2}3+\log_{2}x=\log_{2}5+\log_{2}(x-2)$ Combine the logarithms on the left and right side of the equation as a products: $\log_{2}3x=\log_{2}(5x-10)$ Since $\log$ is one to one, the equation becomes: $3x=5x-10$ Solve for $x$: $3x-5x=-10$ $-2x=-10$ $x=5$
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