Precalculus (6th Edition) Blitzer

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

Chapter 1 - Section 1.7 - Combinations of Functions; Composite Functions - Exercise Set - Page 259: 87

Answer

The value of $f+g$ is $\left[ -4,3 \right]$.

Work Step by Step

Consider the above graph: Curve ${{C}_{1}}$ represents the values of the function $f\left( x \right)$ and curve ${{C}_{2}}$ represents the values of the function $g\left( x \right)$. The domain of a function can be defined as the set of all values of x for which the function is defined. The domain of the function f is $\left[ -4,3 \right]$ and the domain of the function g is $\left[ -5,5 \right]$. Now, to find the domain of the function $f+g$ which is the intersection of the domain of the function f and g. Therefore, the domain of the function $f+g$ is $\left[ -4,3 \right]$ as it is common in the domain of both the function f and g. Hence, the domain of the function $f+g$ is $\left[ -4,3 \right]$.
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