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PROBLEM 21. [TIME ALLOWED = 5 MINUTES]   This is about the truth value of the statement: “There exist positive integers x, y, and z such that x3 + y3 = z2.”   Select one of the following:   (a) x = 1, y = 2, z = 3. (b) x = 2, y = 2, z = 4. (c) x = 3, y = 4, z = 5. (d) (a), but not (b). (e) Both (a) and (b), but not (c).

PROBLEM 21. [TIME ALLOWED = 5 MINUTES]   This is about the truth value of the statement: “There exist positive integers x, y, and z such that x3 + y3 = z2.”   Select one of the following:   (a) x = 1, y = 2, z = 3. (b) x = 2, y = 2, z = 4. (c) x = 3, y = 4, z = 5. (d) (a), but not (b). (e) Both (a) and (b), but not (c).

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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PROBLEM 21. [TIME ALLOWED = 5 MINUTES]
 
This is about the truth value of the statement: “There exist positive integers x, y, and z
such that x3 + y3 = z2.”
 
Select one of the following:
 
(a) x = 1, y = 2, z = 3.
(b) x = 2, y = 2, z = 4.
(c) x = 3, y = 4, z = 5.
(d) (a), but not (b).
(e) Both (a) and (b), but not (c).
 
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