Thinking Mathematically (6th Edition)

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

Chapter 2 - Set Theory - 2.2 Subsets - Exercise Set 2.2 - Page 68: 8


{x|x x is a dog} ⊄ {x|x x is a pure bred dog}

Work Step by Step

As dogs other then the pure bred dog which are part of first set are not present in second set. Therefore {x|x x is a dog} ⊄ {x|x x is a pure bred dog}
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