Question

4. IF A = [5, 6, 7] and B = [7, 8, 9] then A UB is equal to (a) [5, 6, 7, 8, 9] (b) [5, 6, 7] (c) [7, 8, 9] (d) None of these 5. Which of the following sets are null sets (a) {x: x < -4, XEN • (b) 2 and 3 (c) Set of all prime numbers between 15 and 19 (d) {x: x < 5, x>6)​

Answer 1

Answer:

4. IF A = [5, 6, 7] and B = [7, 8, 9] then A UB is equal to (a) [5, 6, 7, 8, 9] (b) [5, 6, 7] (c) [7, 8, 9] (d) None of these 5. Which of the following sets are null sets (a) {x: x < -4, XEN • (b) 2 and 3 (c) Set of all prime numbers between 15 and 19 (d) {x: x < 5, x>6)