यदि \(A\cup B=A\) है, तो कौन-सा कथन निश्चित रूप से सत्य है?
If \(A\cup B=A\), which statement is definitely true?
Explanation opens after your attempt
Correct Answer
A. \(B\subseteq A\)
Concept
Adding (B) to (A) by union does not change (A), so every element of (B) is in (A). Detect subset relations from union identities.
Why this answer is correct
The correct answer is A. \(B\subseteq A\). Adding (B) to (A) by union does not change (A), so every element of (B) is in (A). Detect subset relations from union identities.
Exam Tip
संघ में (B) जोड़ने पर (A) नहीं बदलता, इसलिए (B) के सभी तत्व (A) में हैं। संघ से उपसमुच्चय संबंध पहचानें।
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