Answer
$$D_f= \mathbb{R}$$
Work Step by Step
Please note that the domain of the function $a^u$ is equal to the domain of $u$. Thus, the domain of the function $f(x)=3^{x+6}$ is$$D_f=\mathbb{R}.$$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 3 - Mid-Chapter Check Point - Page 477: 9
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