Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question

7. For each of the following relations on the set of all real numbers, determine whether it is
reflexive, symmetric, antisymmetric, transitive. Here xRy if and only if:
(a) x + 2y = 0

(b) x = 2y
(c) x − y is a rational number

(d) xy = 0
(e) xy ≥ 0 (f) x = 1 or y = 1

(f) x = 1 or y = 1
(g)x is a multiple of y

(h) xy = 1

PS:Please help me by doing all the subparts as it is connected correctly on a word processing document.

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