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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Let R be a relation on the set of all integers such that aRb if and only if a + b is even.
To show that R is transitive, we must prove that
O For any integers a, b and c, if a + b is even and b + c is even, then a + c is even
O For any integers a, b and c, if a + b is even and b + c is even, then a +cis odd
O For any integers a, b and c, if a + b is even or b + c is even, then a + c is even
O For any integers a, b and c, if a + b is even or b + c is even, then a +cis odd
To show that R is not transitive, we must find a counterexample satisfies which of the following statement?
For some integers a, b and c, a + b is even or b + c is even and a + c is even
O For some integers a, b and c, a + b is even or b + c is even and a + c is odd
O For some integers a, b and c, a + b is even and b + c is even and a + c is odd
O For some integers a, b and c, a + b is even and b + c is even and a + c is even
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Transcribed Image Text:Let R be a relation on the set of all integers such that aRb if and only if a + b is even. To show that R is transitive, we must prove that O For any integers a, b and c, if a + b is even and b + c is even, then a + c is even O For any integers a, b and c, if a + b is even and b + c is even, then a +cis odd O For any integers a, b and c, if a + b is even or b + c is even, then a + c is even O For any integers a, b and c, if a + b is even or b + c is even, then a +cis odd To show that R is not transitive, we must find a counterexample satisfies which of the following statement? For some integers a, b and c, a + b is even or b + c is even and a + c is even O For some integers a, b and c, a + b is even or b + c is even and a + c is odd O For some integers a, b and c, a + b is even and b + c is even and a + c is odd O For some integers a, b and c, a + b is even and b + c is even and a + c is even
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