यदि \(A\cap B=A\cup B\) है, तो (A) और (B) के बारे में सही कथन क्या है?
If \(A\cap B=A\cup B\), what is the correct statement about (A) and (B)?
Explanation opens after your attempt
A. (A=B)
Concept
Since \(A\cap B\subseteq A\cup B\) always, equality here forces both sets to be equal. Element-wise thinking is useful in such questions.
Why this answer is correct
The correct answer is A. (A=B). Since \(A\cap B\subseteq A\cup B\) always, equality here forces both sets to be equal. Element-wise thinking is useful in such questions.
Exam Tip
क्योंकि \(A\cap B\subseteq A\cup B\) सदैव होता है, समानता तभी होगी जब दोनों समुच्चय समान हों। ऐसे प्रश्न में तत्व-आधारित सोच उपयोगी है।
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