Discrete Mathematics with Applications 4th Edition

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 2.4 - Page 77: 24

Answer

Let P,Q are the switches in the classrooms 0 mean down 1 mean up --when one switch is up and the other is down the light is on, -- moving the switch that is down to the up position turns the light off. So when P = 1 and Q = 1, then R = 0. It follows that the input/output table has the following appearance:

Work Step by Step

One circuit (among many) having the upper input/output table is the following:
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.