Let T₁ and 72 be any regular expressions. Which of the following equivalencies doesNOT 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 choiceO

Rеgular еxprеssions, also known as rеgеx or rеgеxp, arе a sеquеncе of charactеrs that dеfinе a…

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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Intelligent Machines

Machines that use artificial intelligence to learn from the environment and past experiences to perform better in the presence of variability and uncertainty are called intelligent machines. Intelligence develops according to environment and experience. It is human-like behavior. When the computer system or any programmed machine learns from the inputs and corresponding outputs, it can be called an intelligent machine.

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

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