Answer
See below.
Work Step by Step
$x^4+1\lt -5 \Longrightarrow x^4\lt -6$, as $x^4\ge0$, the inequality has no solution.
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 3 - Polynomial and Rational Functions - Section 3.6 Polynomial and Rational Inequalities - 3.6 Assess Your Understanding - Page 265: 85
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