Discrete Mathematics and Its Applications, Seventh Edition

Published by McGraw-Hill Education
ISBN 10: 0073383090
ISBN 13: 978-0-07338-309-5

Chapter 2 - Section 2.2 - Set Operations - Exercises - Page 138: 60

Answer

n+1

Work Step by Step

Successor of a set A is $A \cup ${$A$}. A set cannot contain itself. So, $A \notin A$. This means adding $A \cup ${$A$} will have number of elements one more than that the elements of $A$. So, if $A$ has $n$ elements, then successor of $A$ has $n+1$ elements.
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