यदि \(A=\{1,2,3\}\) और \(B=\{1,4,9\}\), तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें \(b=a^2\) है?
If \(A=\{1,2,3\}\) and \(B=\{1,4,9\}\), how many pairs ((a,b)) in \(A\times B\) satisfy \(b=a^2\)?
Explanation opens after your attempt
Correct Answer
C. (3)
Concept
Since \(1^2=1\), \(2^2=4\), and \(3^2=9\), there are (3) pairs. For rule-based relations, check each first component.
Why this answer is correct
The correct answer is C. (3). Since \(1^2=1\), \(2^2=4\), and \(3^2=9\), there are (3) pairs. For rule-based relations, check each first component.
Exam Tip
\(1^2=1\), \(2^2=4\), और \(3^2=9\), इसलिए (3) युग्म हैं। नियम आधारित संबंध में हर पहला अवयव जाँचें।
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