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1. Prove the following entailment in SD. PQ, P →REP→ (Q ^ R)

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

1. Prove the following entailment in SD.
P Q, P →R E P→ (Q ^ R)

Expert Solution

Step 1

The premises we have are

P -> Q

P -> R

The conclusion is P -> (Q^R)

Here let's take P as third premise and we should be able to prove Q^R

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