Write this statement in words: ? = {? ∈ ? +| − 1 ≤ ? ≤ 1}
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
Write this statement in words: ? = {? ∈ ? +| − 1 ≤ ? ≤ 1}
Expert Solution
Step 1
The given statement:
? = {? ∈ ? +| − 1 ≤ ? ≤ 1}
The above statement is the notation used to define a set in mathematics.
The following symbols used are:
The symbol "∈" means "belongs to".
The symbol "|" means "such that".
The symbol "1 ≤ ? ≤ 1" represents the interval.
The curly brackets {} represents the set.
Take some examples to understand sets:
The 5 ∈ P depicts that 5 is an element of P or 5 belongs to set P.
A = {x | x ∈ N and 5 < x < 10} means x is an integer between 5 and 10. It is represented by set A = {6, 7, 8, 9}
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