Define the sets A, B, C, D, and E as follows: • A = {x ER: x < -2} • B = {x ER: x > 2} ● • C= {xER: x < 2} • D= {x € R: |x|≤ 2} • E= {x ER: x ≤ -2} Use the definitions for A, B, C, D, and E to answer the question: Do the sets A, B, and C form a partition of R? If not, which condition of a partition is not satisfied? No. AU BUC R because 2, -2 €AU BUC. O No. Because AUB UC = R Yes. A U BUC # R because 2, -2 # AU BUC. O Yes. A U BUC =R because 2, -2 € AU BUC.

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
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Use the definitions for A, B, C, D, and E to answer the question:

Do the sets A, B, and C form a partition of R? If not, which condition of a partition is not satisfied?

Define the sets A, B, C, D, and E as follows:
• A = {x ER: x < -2}
• B = {x ER: x > 2}
●
• C= {xER: x < 2}
• D= {x € R: |x|≤ 2}
• E= {x ER: x ≤ -2}
Use the definitions for A, B, C, D, and E to answer the question:
Do the sets A, B, and C form a partition of R? If not, which condition of a partition is not
satisfied?
No. AU BUC R because 2, -2 €AU BUC.
O No. Because AUB UC = R
Yes. A U BUC # R because 2, -2 # AU BUC.
O Yes. A U BUC =R because 2, -2 € AU BUC.
Transcribed Image Text:Define the sets A, B, C, D, and E as follows: • A = {x ER: x < -2} • B = {x ER: x > 2} ● • C= {xER: x < 2} • D= {x € R: |x|≤ 2} • E= {x ER: x ≤ -2} Use the definitions for A, B, C, D, and E to answer the question: Do the sets A, B, and C form a partition of R? If not, which condition of a partition is not satisfied? No. AU BUC R because 2, -2 €AU BUC. O No. Because AUB UC = R Yes. A U BUC # R because 2, -2 # AU BUC. O Yes. A U BUC =R because 2, -2 € AU BUC.
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