Discrete Mathematics with Applications 4th Edition

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

Chapter 8 - Relations - Exercise Set 8.1 - Page 449: 20

Answer

AxB = {(-1,1),(-1,2),(1,1),(1.2),(2,1),(2,2),(4,1),(4,2)} R = {(-1,1),(1,1),(2,2)} S = {(-1,1),(1,1),(2,2),(4,2)} R ∪ S = {(-1,1),(1,1),(2,2),(4,2)} R ∩ S = {(-1,1),(1,1),(2,2)}

Work Step by Step

AxB = {(-1,1),(-1,2),(1,1),(1.2),(2,1),(2,2),(4,1),(4,2)} R = {(-1,1),(1,1),(2,2)} S = {(-1,1),(1,1),(2,2),(4,2)} R ∪ S = {(-1,1),(1,1),(2,2),(4,2)} R ∩ S = {(-1,1),(1,1),(2,2)}
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