Thinking Mathematically (6th Edition)

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 - Exercise Set 3.6 - Page 178: 11


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Work Step by Step

De Morgan's Laws says that $\sim (p\land q)\equiv \sim p\lor \sim q$ and $\sim (p\lor q)\equiv \sim p\land \sim q$. Thus the equivalent statement is: "Australia is not an island or China is not an island".
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