The domain is the set {a, b, c, d, e}. The table below shows the value of two predicates for each of the elements in the domain. Ex: The value of P(c) is true because the truth value in row c and column P is T. P Q Give exactly one counterexample that shows the a T F proposition VæP(x) is false. b F F Ex: с CTT Give exactly one example that shows the proposition 3xQ(x) is true. dT T e F

The domain is the set {a, b, c, d, e}. The table below shows the value of two predicates for each of the elements in the domain. Ex: The value of P(c) is true because the truth value in row c and column P is T. P Q Give exactly one counterexample that shows the a T F proposition VæP(x) is false. b F F Ex: с CTT Give exactly one example that shows the proposition 3xQ(x) is true. dT T e F

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

Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.

Question

The domain is the set {a, b, c, d, e}. The table below shows the value of two
predicates for each of the elements in the domain. Ex: The value of P(c) is true
because the truth value in row c and column P is T.
P Q
Give exactly one counterexample that shows the
proposition Væ P(x) is false.
а т F
b F F
Ex: C
CT T
Give exactly one example that shows the proposition
xQ(x) is true.
dTT
e FT

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