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¬[[p → ¬q) v s] = [p Aq A -s] -[[p → ¬q) → s] = [¬(p^q) A¬s] [(pA¬q) → s] = [¬s → (-p v q)] [¬s → (-p v q)] = [s V q V ¬p]

¬[[p → ¬q) v s] = [p Aq A -s] -[[p → ¬q) → s] = [¬(p^q) A¬s] [(pA¬q) → s] = [¬s → (-p v q)] [¬s → (-p v q)] = [s V q V ¬p]

Database System Concepts
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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Please answer true or false

I think the first is true,second is true, third is false and fourth is false

but I want to check my answers

-[(p → ¬q) V s] = [p^q A -s] ¬[(p → ¬9) → s] = [¬(p^q) A¬s] [(pA¬q) → s] = [¬s → (-p v q)] [-s → (-p v q)] = [s V q v -p]
Transcribed Image Text:-[(p → ¬q) V s] = [p^q A -s] ¬[(p → ¬9) → s] = [¬(p^q) A¬s] [(pA¬q) → s] = [¬s → (-p v q)] [-s → (-p v q)] = [s V q v -p]
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