Discussion
The set {x | x is a real number and x² = -1} is a:
Answer: D
No real number squares to a negative value, since \( x^{2} \geq 0 \) for every real \( x \).
The set therefore has no members and is the empty set. A singleton would need exactly one element - which it would have over the complex numbers, but the condition here restricts to reals.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development