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(4) {w € (a, b)*: w has bba as a substring} O (a U b)* bba O bba (a U b)* O (a U b)* bba (a U b)* O b(a U b)* b (a U b)*a

(4) {w € (a, b)*: w has bba as a substring} O (a U b)* bba O bba (a U b)* O (a U b)* bba (a U b)* O b(a U b)* b (a U b)*a

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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(4) {w E (a, b)* : w has bba as a O (a U b)* bba bba (a U b)* O (a U b)* bba (a U b)* O b(a U b)* b (a U b)*a substring}
Transcribed Image Text:(4) {w E (a, b)* : w has bba as a O (a U b)* bba bba (a U b)* O (a U b)* bba (a U b)* O b(a U b)* b (a U b)*a substring}
Write a regular expression to describe each of the following languages. Example: {w € (a, b)* : w has both aa and bb as substrings} Regular expression: (a U b)* aa (a U b)* bb (a U b)* U (a U b)* bb (a U b)* aa (a U b)*
Transcribed Image Text:Write a regular expression to describe each of the following languages. Example: {w € (a, b)* : w has both aa and bb as substrings} Regular expression: (a U b)* aa (a U b)* bb (a U b)* U (a U b)* bb (a U b)* aa (a U b)*
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