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1. {x = {a, b, c, d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string x) 2. {aj is a power of 2} 3. {x = {0, 1}* | x represents a power of 2 in binary} 4. L(0*1*0*1*) 5. the set of all balanced strings of parentheses of three types (( ) [ ] { } 6. {a^bm | n

1. {x = {a, b, c, d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string x) 2. {aj is a power of 2} 3. {x = {0, 1}* | x represents a power of 2 in binary} 4. L(0*1*0*1*) 5. the set of all balanced strings of parentheses of three types (( ) [ ] { } 6. {a^bm | n

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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Which of the following sets are regular and which are not regular? 

1. {x = {a, b, c, d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string x) 2. {aj is a power of 2} 3. {x = {0, 1}* | x represents a power of 2 in binary} 4. L(0*1*0*1*) 5. the set of all balanced strings of parentheses of three types ( ) [ ] { } 6. {a^bm|n<m < 10}
Transcribed Image Text:1. {x = {a, b, c, d}* | #a(x) = #b(x) = #c(x) = #d(x)} (where #a(x) is the number of occurrences of the symbol a in string x) 2. {aj is a power of 2} 3. {x = {0, 1}* | x represents a power of 2 in binary} 4. L(0*1*0*1*) 5. the set of all balanced strings of parentheses of three types ( ) [ ] { } 6. {a^bm|n<m < 10}
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