Answer
continuous $(-\infty, \infty)$, discontinuous $none$.
Work Step by Step
For $f(x)=4sin(x)$, we can find the continuous region $(-\infty, \infty)$, discontinuous region/point $none$.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 13 - A Preview of Calculus: The Limit, Derivative, and Integral of a Function - Section 13.3 One-sided Limits; Continuous Functions - 13.3 Assess Your Understanding - Page 910: 65
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