Question 10
SetsIf S = {x : x2 = 9, x > 4}, then S equal to
- A.0
- B.{0}
- C.∅
- D.{∅}
Show the answer and explanation
Answer: C (∅)
Explanation
x² = 9 gives x = 3 or −3, and neither is greater than 4. So S has no elements: it is the empty set ∅.
If S = {x : x2 = 9, x > 4}, then S equal to
Answer: C (∅)
x² = 9 gives x = 3 or −3, and neither is greater than 4. So S has no elements: it is the empty set ∅.