यदि \(A=\{1,2,4,8\}\) और \(B=\{2,4,8,16\}\) है, तो \(A\times B\) में ऐसे कितने युग्म ((x,y)) हैं जिनके लिए (y=2x) है?
If \(A=\{1,2,4,8\}\) and \(B=\{2,4,8,16\}\), how many pairs ((x,y)) in \(A\times B\) satisfy (y=2x)?
Explanation opens after your attempt
C. (4)
Concept
For every \(x\in A\), \(2x\in B\), giving ((1,2),(2,4),(4,8),(8,16)). There are (4) pairs.
Why this answer is correct
The correct answer is C. (4). For every \(x\in A\), \(2x\in B\), giving ((1,2),(2,4),(4,8),(8,16)). There are (4) pairs.
Exam Tip
हर \(x\in A\) के लिए \(2x\in B\), इसलिए ((1,2),(2,4),(4,8),(8,16)) मिलते हैं। कुल (4) युग्म हैं।
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