Discrete Mathematics with Applications 4th Edition

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

Chapter 12 - Regular Expressions and Finite-State Automata - Exercise Set 12.1 - Page 790: 31

Answer

pre[a − z]+

Work Step by Step

All words that are written in lower-case letters and start with the letters pre but do not consist of pre all by itself in bellow language. -pre[a − z]+
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