Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 3 - Section 3.2 - Exponential Functions - Exercise Set - Page 464: 78

Answer

Domain:$\quad (-\infty,7)$

Work Step by Step

Logarithmic functions are defined for positive arguments only. The argument here is $7-x $, and it must be positive, so we solve $7-x \gt 0$ $7 \gt x $ Domain:$\quad (-\infty,7)$
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