Fundamentals of Information Systems
Fundamentals of Information Systems
8th Edition
ISBN: 9781305082168
Author: Ralph Stair, George Reynolds
Publisher: Cengage Learning
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Six attributes of quality information.

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9. Let L₁=L(ab*aa), L₂=L(a*bba*). Find a regular expression for (L₁ UL2)*L2. 10. Show that the language is not regular. L= {a":n≥1} 11. Show a derivation tree for the string aabbbb with the grammar S→ABλ, A→aB, B→Sb. Give a verbal description of the language generated by this grammar.

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Fundamentals of Information Systems

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