Question 6.(? Let M(x, y) be the predicate " has emailed y". Let the domain be all students in this class. Select the statement below which means: "Everyone in the class has been emailed by someone in the class". xvy M(x, y) Vxy M(x, y) ³x M(x, y) x M(x,y) x M(x,y) x M(x,y) Question 7 (1 Let F(x, y) be the predicate " can fool y". Select the statement below which is the English translation of Vy³x F(x, y). There is someone everyone can fool. Everyone has someone they can fool. Everyone has someone who can fool them. There is someone who can fool everyone.

Question 6.(? Let M(x, y) be the predicate " has emailed y". Let the domain be all students in this class. Select the statement below which means: "Everyone in the class has been emailed by someone in the class". xvy M(x, y) Vxy M(x, y) ³x M(x, y) x M(x,y) x M(x,y) x M(x,y) Question 7 (1 Let F(x, y) be the predicate " can fool y". Select the statement below which is the English translation of Vy³x F(x, y). There is someone everyone can fool. Everyone has someone they can fool. Everyone has someone who can fool them. There is someone who can fool everyone.

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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The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

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Using C++ programming language create a class triangle that has three sides as class members and contains overloaded constructor. If two sides are given then calculate area as ½ * side1 * side2. However if three sides are given then calculate area using the Heron’s formula.
One of the following items is a run-on (or fused) sentence, another contains a comma splice, and another is correct. Choose the item that is correct. One of the following items is a run-on (or fused) sentence, another contains a comma splice, and another is correct. Choose the item that is correct. The food in that diner is awful besides the service is slow. The food in that diner is awful, besides the service is slow. The food in that diner is awful; besides, the service is slow.
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3. Let S(x) be the statement "x studied for the exam" and H(x, y) be the statement "x scored higher than y in the exam," where the domain of x and y consists of all students in this class. Which logical expression corresponds to the following statement? "Every student in this class who studied for the exam scored higher in the exam than every student who did not study for the exam." a. VxVy (H (x, y) → (S(x) ^ ¬S(y))) b. VxVy(S(x)^¬S(y) ^ H (x, y)) c. VxVy((S(x) ^ ¬S(y)) → H (x, y)) d. VxVy((S(x) → ¬S(y)) → H (x, y))
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