Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 3 - The Logic of Quantified Statements - Exercise Set 3.3 - Page 129: 7


This is true because triangle d is above every square.

Work Step by Step

Recall that if you want to establish the truth of a statement of the form: $\exists x \in D$ such that $\forall y \in E$, P(x,y), you job is to find one particular x in D that will "work" no matter what y in E anyone might choose to challenge you with.
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.