Complete the logical proof for the following argument. ExP(x) X(P(x) → Q(x)) : 3xQ(x) Justification Step Proposition 1 ExP(x) 2 c is an element in the domain AP(c) c is an element in the domain 4 Hypothesis P(c) Q(c) 6. Simplification, 2 Q(c) 8 ExQ(x)

Complete the logical proof for the following argument. ExP(x) X(P(x) → Q(x)) : 3xQ(x) Justification Step Proposition 1 ExP(x) 2 c is an element in the domain AP(c) c is an element in the domain 4 Hypothesis P(c) Q(c) 6. Simplification, 2 Q(c) 8 ExQ(x)

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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Concept explainers

Concepts in Designing Database

A database design is the process of data organization based on a database model. The process deals with identifying what data should be stored in a database and how data elements relate to each other.

Entity Relationship Diagram

Complex real-world applications call for large volumes of data. Therefore, it is necessary to build a great database to store data safely and coherently. The ER data model aids in the process of database design. It helps outline the structure of an organization’s database by understanding the real-world interactions of objects related to the data. For example, if a school is tasked to store student information, then analyzing the correlation between the students, subjects, and teachers would help identify how the data needs to be stored.

Question

Complete the logical proof for the following argument.
ExP(x)
X(P(x) →
.3xQ(x)
Justification
Step
Proposition
1
ExP(x)
2 c is an element in the domain AP(c)
c is an element in the domain
4
Hypothesis
P(c) → Q(c)
Simplification, 2
7
Q(c)
8

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