Determine which of these relations are reflexive. The variables x,y,x',y' represent integers. A. x~y if and only if x+y is even B. x~y if and only if x+y is odd C. x~y if and only if x+y is positive D. x~y if and only if xy is positive E. x~y if and only if x-y is a multiple of 10

Principles of Information Systems (MindTap Course List)
12th Edition
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Ralph Stair, George Reynolds
Chapter5: Database Systems And Applications
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Determine which of these relations are reflexive. The variables x,y,x',y' represent integers.

A. x~y if and only if x+y is even

B. x~y if and only if x+y is odd

C. x~y if and only if x+y is positive

D. x~y if and only if xy is positive

E. x~y if and only if x-y is a multiple of 10

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