Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter 2 - Nonlinear Functions - 2.1 Properties of Functions - 2.1 Exercises: 17

Answer

$(-\infty,\infty)$

Work Step by Step

We are given that $f(x)=2x$ and want to determine all possible real numbers $x$ for which $f(x)$ is defined. Any real number may be multiplied by 2, so the domain is all real numbers, which can be written as $(-\infty,\infty)$.
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