Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 5 - Exponential and Logarithmic Functions - Chapter Review - Chapter Test - Page 348: 5



Work Step by Step

Note that $243=3^5$ Thus, $3^x=243 \\3^x=3^5$ We can see that the bases are equal (and not $1$ or $ -1$), hence the exponents must be equal. Therefore, $x=5.$ The solution set is: $\{5\}$.
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