#### Answer

$(-\infty,-1),(-1,1),(1,\infty)$

#### Work Step by Step

Whenever the slope of the function changes from positive to negative or vice-versa then it ceases to be one-to-one on that interval.

Published by
Pearson

ISBN 10:
0321947347

ISBN 13:
978-0-32194-734-5

$(-\infty,-1),(-1,1),(1,\infty)$

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