COS1501
Assignment 3 2024
Unique #:653581
Due Date: 22 July 2024, 11:00 PM
Detailed solutions, explanations, workings
and references.
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, UNISA 2024 COS1501-24-Y Welcome Message Assessment 3
QUIZ
Started on Wednesday, 17 July 2024, 8:26 PM
State Finished
Completed on Wednesday, 17 July 2024, 10:03 PM
Time taken 1 hour 36 mins
Question 1
Complete
Marked out of 2.00
Suppose U = {1, 2, 3, 4, 5, a, b, c} is a universal set with the subset A = {a, b, c, 1, 2, 3, 4}.
Which one of the following relations on A is NOT functional?
a. {(1, 3), (b, 3), (1, 4), (b, 2), (c, 2)}
b. {(a, c), (b, c), (c, b), (1, 3), (2, 3), (3, a)}
c. {(a, a), (c, c), (2, 2), (3, 3), (4, 4)}
d. {(a, c), (b, c), (1, 3), (3, 3)}
Question 2
Complete
Marked out of 2.00
Suppose U = {1, 2, 3, 4, 5, a, b, c} is a universal set with the subset A = {a, b, c, 1, 2, 3, 4}.
Which one of the following alternatives represents a surjective function from U to A?
a. {(1, 4), (2, b), (3, 3), (4, 3), (5, a), (a, c), (b, 1), (c, b)}
b. {(a, 1), (b, 2), (c, a), (1, 4), (2, b), (3, 3), (4, c)}
c. {(1, a), (2, c), (3, b), (4, 1), (a, c), (b, 2), (c, 3)}
d. {(1, a), (2, b), (3, 4), (4, 3), (5, c), (a, a), (b, 1), (c, 2)}