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1. Let L₁ = {all string that ends in a} and L₂ = {all string that starts in b} for E= {a,b} Find the following language. a. L₂L1 b. ¬(L₂) (L₁) C. d. L₁ L₂ e. L₁ UL₂

1. Let L₁ = {all string that ends in a} and L₂ = {all string that starts in b} for E= {a,b} Find the following language. a. L₂L1 b. ¬(L₂) (L₁) C. d. L₁ L₂ e. L₁ UL₂

Database System Concepts
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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Instruction: Read Part 1: Chapter 1-4 of the book Automata, Computability and Complexity by Elaine Rich and answer the following Questions. 1 1. Let L₁ = {all string that ends in a} and L₂ = {all string that starts in b} for Σ = {a,b} Find the following language. a. L₂L1 b. ¬(L₂) (4₁) c. d. L₁ L₂ e. L₁ UL2 2. Let L {even numbers of a's and b's}. For each of the following strings, state whether it is an element of L. a. b. ababababaa aabbaabbaa aabbcc C. d. baabaabaabbb e. E 3. Let L = {up, down, right, left}. List the element of L² or LL in lexicographic order.
Transcribed Image Text:Instruction: Read Part 1: Chapter 1-4 of the book Automata, Computability and Complexity by Elaine Rich and answer the following Questions. 1 1. Let L₁ = {all string that ends in a} and L₂ = {all string that starts in b} for Σ = {a,b} Find the following language. a. L₂L1 b. ¬(L₂) (4₁) c. d. L₁ L₂ e. L₁ UL2 2. Let L {even numbers of a's and b's}. For each of the following strings, state whether it is an element of L. a. b. ababababaa aabbaabbaa aabbcc C. d. baabaabaabbb e. E 3. Let L = {up, down, right, left}. List the element of L² or LL in lexicographic order.
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