(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)
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...
Related questions
Question

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}

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)*
Expert Solution

Step 1: Introduction
Regular expression is a pattern that the regular expression engine attempts to match that in input text. In regular expression, each pattern consists of one or more character literals, operators etc.
Step by step
Solved in 3 steps with 9 images

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