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 - Page 54: 20


$(-\infty, \infty)$

Work Step by Step

We want to find all $x$ values for which $f(x)=(x+3)^2$ is defined. We can always add 3 to any real number and then square the result, so the domain of $f$ is all real numbers, which can be expressed in interval notation as $(-\infty, \infty)$.
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