यदि \(A=\{-2,-1,0,1,2\}\) और \(B=\{0,1,4\}\), तो \(A\times B\) में \(b=a^2\) वाले युग्मों की संख्या कितनी है?
If \(A=\{-2,-1,0,1,2\}\) and \(B=\{0,1,4\}\), how many pairs in \(A\times B\) satisfy \(b=a^2\)?
Explanation opens after your attempt
C. (5)
Concept
The squares of all five (a)-values are (4,1,0,1,4), all in (B). Therefore each (a) gives one pair.
Why this answer is correct
The correct answer is C. (5). The squares of all five (a)-values are (4,1,0,1,4), all in (B). Therefore each (a) gives one pair.
Exam Tip
पांचों (a) मानों के वर्ग (4,1,0,1,4) सभी (B) में हैं। इसलिए प्रत्येक (a) से एक युग्म बनेगा।
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