यदि \(A=\{m,n,o\}\) और \(B=\varnothing\) है, तो \(A\cup B\) क्या होगा?
If \(A=\{m,n,o\}\) and \(B=\varnothing\), what is \(A\cup B\)?
Explanation opens after your attempt
Correct Answer
B. ( {m,n,o} )
Concept
The empty set has no elements, so \(A\cup \varnothing=A\). Knowing identity rules helps in quick scoring.
Why this answer is correct
The correct answer is B. ( {m,n,o} ). The empty set has no elements, so \(A\cup \varnothing=A\). Knowing identity rules helps in quick scoring.
Exam Tip
रिक्त समुच्चय में कोई अवयव नहीं होता इसलिए \(A\cup \varnothing=A\) है। पहचान सूत्रों को याद रखना आसान अंक दिलाता है।
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