Answer
See graph, the functions $y=\pm 2^{-x}$ for the boundaries of the function $y=2^{-x}cos(4\pi x)$ which
is "sandwiched" between the other two curves and oscillates within.
Work Step by Step
see graph.
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 5 - Review - Exercises - Page 464: 64
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