Given two relations R and S, defined on the set A = {1, 2, 3,., 40} where R = { (X,y) | x is divisible by 2 and y is divisible by 4}, and S= { (x,y) | x= 2y }. The cardinality of R = [a] and the cardinality of S = [b] and the cardinality of RUS = [C]. Specified Answer for: a 12 Specified Answer for: b 6 Specified Answer for: c 10 Correct Answers for: a Evaluation Method Correct Answer Case Sensitivity O Exact Match 200 Correct Answers for: b Evaluation Method Correct Answer Case Sensitivity O Exact Match 20 Correct Answers for: c Evaluation Method Correct Answer Case Sensitivity O Exact Match 215

Given two relations R and S, defined on the set A = {1, 2, 3,., 40} where R = { (X,y) | x is divisible by 2 and y is divisible by 4}, and S= { (x,y) | x= 2y }. The cardinality of R = [a] and the cardinality of S = [b] and the cardinality of RUS = [C]. Specified Answer for: a 12 Specified Answer for: b 6 Specified Answer for: c 10 Correct Answers for: a Evaluation Method Correct Answer Case Sensitivity O Exact Match 200 Correct Answers for: b Evaluation Method Correct Answer Case Sensitivity O Exact Match 20 Correct Answers for: c Evaluation Method Correct Answer Case Sensitivity O Exact Match 215

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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4. Write the relation matrix for the relation R on the set (a,b.c.d.e.f) which is defined as follows: R={a,a), (a,b), (a,c), (b,a). (b,c). (c,a), (c,b), (d,d), (f.f).
PLEASE TYPE ONLY IF NOT YPE THEN DO NOT DO THIS*** Exercise 8.1.3: Matrices and arrow diagrams for relations expressed as sets of pairs. Draw the arrow diagram and the matrix representation for each relation. (b) The domain for relation R is {1, 2, 3, 4}. R = { (1, 2), (3, 4), (2, 3), (3, 2), (2, 1), (3, 1), (4, 3) }. (c) The domain for relation R is {1, 2, 3, 4}. R = { (1, 2), (2, 1), (3, 3) }. (d) The domain for relation R is {1, 2, 3}. R = ∅.
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let S = {s1, s2, s3, s4, s5}. Give an example of an equivalence relation R on S such that S/R has three elements and one equivalence class of R has at least three elements. Justify your example is correct by listing all of the elements of S/R and all of the elements in each equivalence class of R.
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Suppose that R is the following relation on the set A = {1, 2, 3, 4}: R = A × A − {(1, 1), (2, 2), (3, 3), (4,4)} Determine which of the following is the relation R². R1. R1 = AX A R2. R2 = {} R3. R3 R -
Consider the following set F of functional dependencies on the relation schema (А, В, С, D, E, G): А— ВCD ВС — DE В — D D → A
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