Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 3 - Logic - 3.2 Compound Statements and Connectives - Exercise Set 3.2 - Page 134: 112

Answer

The statement \[\sim (p\wedge q)\] means that not statement p or not statement q and the statement \[\sim p\wedge q\]means that not statement p and statement q.

Work Step by Step

Consider the provided symbolic statement\[\tilde{\ }\,(p\wedge q)\]. Parenthesis represents negation of both, i.e., \[\tilde{\ }(p\wedge q)\equiv (\tilde{\ }p)\vee (\tilde{\ }q)\] That means not statement p or not statement q. Consider another provided symbolic statement\[\sim p\wedge q\]. There is no parenthesis. Thus, Negation comes only before p: \[\tilde{\ }p\wedge q\equiv (\tilde{\ }p)\wedge q\] That means not statement p and statement q. Example: Let’s assume two simple statement p and q. p: Sun rises in the east. q: \[2+2=4\] Now, consider the provided symbolic form\[\tilde{\ }(p\wedge q)\]. It represents neither the sun rises in the east nor\[2+2=4\]. Now consider the provided symbolic form\[\sim p\wedge q\]. It represents sun does not rises in the east and\[2+2=4\].
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.