Answer
See graph:
(a) $(-1,\infty)$.
(b) $(-\infty,-1)$.
Work Step by Step
See graph:
(a) The function is increasing over $(-1,\infty)$.
(b) The function is decreasing over $(-\infty,-1)$.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 3 - Polynomial and Rational Functions - 3.4 Polynomial Functions: Graphs, Applications, and Models - 3.4 Exercises - Page 352: 20
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