{21n : n € Z} U {14n : n € Z} ≤ {7n: n € Z}. Consider the proof that shows if x = {21n : n € Z} then x € {7n : n€ Z} or if x = {14n : n = Z} then x = {7n: n ≤ Z}. True or False: This is a valid proof approach that would prove the claim. (This is not asking whether this is an actual proof of the result. It's asking whether this general, high-level approach would suffice to prove the result.)

{21n : n € Z} U {14n : n € Z} ≤ {7n: n € Z}. Consider the proof that shows if x = {21n : n € Z} then x € {7n : n€ Z} or if x = {14n : n = Z} then x = {7n: n ≤ Z}. True or False: This is a valid proof approach that would prove the claim. (This is not asking whether this is an actual proof of the result. It's asking whether this general, high-level approach would suffice to prove the result.)

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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