Answer
if a security code is not entered then door will not open
Work Step by Step
r unless s means if ∼s then r.
Discrete Mathematics with Applications 4th Edition
by Epp, Susanna S.
Published by
Cengage Learning
ISBN 10:
0-49539-132-8
ISBN 13:
978-0-49539-132-6
Chapter 2 - The Logic of Compound Statements - Exercise Set 2.2 - Page 50: 39
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