यदि \(A\neq \varnothing\), \(B\neq \varnothing\) और \(A\times B=B\times A\) है, तो कौन सा निष्कर्ष सही है?
If \(A\neq \varnothing\), \(B\neq \varnothing\) and \(A\times B=B\times A\), which conclusion is correct?
Explanation opens after your attempt
Correct Answer
A. (A=B)
Concept
For non-empty sets, \(A\times B=B\times A\) only when (A=B). In exams, always check the empty-set condition.
Why this answer is correct
The correct answer is A. (A=B). For non-empty sets, \(A\times B=B\times A\) only when (A=B). In exams, always check the empty-set condition.
Exam Tip
अशून्य समुच्चयों के लिए \(A\times B=B\times A\) तभी होता है जब (A=B)। परीक्षा में खाली समुच्चय की शर्त जरूर देखें।
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