Question 5 For each of the following languages, determine whether or not it is context-free. You must justify your answer. 1. {w E {a, b}* | w = wk} C {a, b}* 2. {ak b2k ck E {a, b, c}* | k > 0} C {a, b, c}* 3. {a"b*c* € {a, b, c}* | n > 0, k > 0} C {a, b, c}* 4. {abab*abk e {a, b}* | k > 0} C {a, b}*

Question 5 For each of the following languages, determine whether or not it is context-free. You must justify your answer. 1. {w E {a, b}* | w = wk} C {a, b}* 2. {ak b2k ck E {a, b, c}* | k > 0} C {a, b, c}* 3. {a"bc € {a, b, c}* | n > 0, k > 0} C {a, b, c}* 4. {abababk e {a, b} | k > 0} C {a, b}*

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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