यदि \(A=\{0,1,2\}\) और \(B=\{-1,0,1\}\) है, तो \(A\times B\) में ऐसे कितने युग्म ((x,y)) हैं जिनके लिए \(x^2+y^2=1\) है?
If \(A=\{0,1,2\}\) and \(B=\{-1,0,1\}\), how many pairs ((x,y)) in \(A\times B\) satisfy \(x^2+y^2=1\)?
Explanation opens after your attempt
B. (3)
Concept
The valid pairs are ((0,-1),(0,1),(1,0)). Hence there are (3) pairs.
Why this answer is correct
The correct answer is B. (3). The valid pairs are ((0,-1),(0,1),(1,0)). Hence there are (3) pairs.
Exam Tip
सही युग्म ((0,-1),(0,1),(1,0)) हैं। इसलिए कुल (3) युग्म मिलते हैं।
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