यदि \(A=\{-2,-1,0,1,2\}\) और \(B=\{0,1,4\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें \(a^2=b\) है?
If \(A=\{-2,-1,0,1,2\}\) and \(B=\{0,1,4\}\), how many pairs ((a,b)) in \(A\times B\) satisfy \(a^2=b\)?
Explanation opens after your attempt
Correct Answer
C. (5)
Concept
For every \(a\in A\), \(a^2\) is in (B), so (5) pairs are formed. Watch squares of negative numbers carefully.
Why this answer is correct
The correct answer is C. (5). For every \(a\in A\), \(a^2\) is in (B), so (5) pairs are formed. Watch squares of negative numbers carefully.
Exam Tip
हर \(a\in A\) के लिए \(a^2\) (B) में है, इसलिए (5) युग्म बनते हैं। ऋणात्मक संख्याओं के वर्ग को ध्यान से देखें।
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