Let ₁ and 2 be any regular expressions. Which of the following equivalencies does NOT hold? Recall that r1 r2 iff L(7₁) = L(r2). O ○ (ri+r₂)* = (r¡ +r;)* O (₁+₂) = (₂+₁)* (r₁+T₂)* = (₁ + r) (₁ + r₂)* = (1+r₂)*
Let ₁ and 2 be any regular expressions. Which of the following equivalencies does NOT hold? Recall that r1 r2 iff L(7₁) = L(r2). O ○ (ri+r₂)* = (r¡ +r;)* O (₁+₂) = (₂+₁)* (r₁+T₂)* = (₁ + r) (₁ + r₂)* = (1+r₂)*
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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Question
![Let T₁ and 72 be any regular expressions. Which of the following equivalencies does
NOT hold? Recall that r₁ = r2 iff L (₁) = L(T₂).
O (ri+r₂)* = (ri+r₂)*
(₁ + r₂)* = (r₂ + r₁)*
(r₁+T₂)* = (ri + r₂)
○ (r₁+r₂)* = (r¡ +r₂)*
Clear my choice
O](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F91ff5a8d-46b8-48db-860b-ec1c6d9b5535%2F9dbbfe30-55ac-4b3d-b33e-21af9f63ad00%2Fyii3v7h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Let T₁ and 72 be any regular expressions. Which of the following equivalencies does
NOT hold? Recall that r₁ = r2 iff L (₁) = L(T₂).
O (ri+r₂)* = (ri+r₂)*
(₁ + r₂)* = (r₂ + r₁)*
(r₁+T₂)* = (ri + r₂)
○ (r₁+r₂)* = (r¡ +r₂)*
Clear my choice
O
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