I. (12 pts) “Notes…” Exercise 1, pp 1.6 – 1.7 #s 4a, 5c, 6d, 6f, 7a, 8a. Note: Set of Whole numbers = Se t of Counting n umbers = Set of Natural numbe rs = {0, 1, 2, 3, 4, …} 4a) Give the number represented by 7 3 5 5 + Answer: -3 5c) If x = 2 and y = -1 find the value of xy 4 2 y − Answer: 9 6 d&f) Find the relation between the pairs of numbers by replacing “and” with the appropriate symbol “=”, “<”, “>”: 6d) (2 – 3)(2 + 3) and 2 2 – 3 2 . Answer: = 6f) (-1) 100 and (-1) 101 Answer: > 7a) Find all the possible whole numbers that can be assigned to x if x > 0 and 4 x ≤ . 8a) Write the following number relations in symbols: The age x of a UP Freshman is at least 15 years. Answer: x ≥ 15 II. (18 pts) “Notes…” Exercise 2, pp. 1.11 – 1.12 #s 4a, 5, 6, 7a, 7c, 11a-d 4a) Draw a Venn Diagram illustrating the relationship between sets A and B where A ≠ B: B A ⊂ . Answer: 5) If B A ⊂ , which of the following is true? Answer: c) A ∩ B = A 6) Which of the following can be regarded as a set in mathematics? Answer:a) All even numbers greater than 10 Page 1 of 3 B A 1
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