Using a Venn diagram, show that if and only if A ⊆ B if and only if A ∪ B = B.

Chapter 24, PROBLEM SET 24.2 #17

Using a Venn diagram, show that if and only if A ⊆ B if and only if A ∪ B = B.

Related Book For answer-question

Advanced Engineering Mathematics

10th edition

Authors: Erwin Kreyszig

ISBN: 978-0470458365