Answer
See below.
Work Step by Step
De Morgan's Laws say that $\sim (p\land q)\equiv \sim p\lor \sim q$ and $\sim (p\lor q)\equiv \sim p\land \sim q$.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 3 - Logic - 3.6 Negations of Conditional Statements and De Morgan's Law - Concept and Vocabulary Check - Page 177: 2
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