यदि \(A=\{1,2\}\) और \(B=\{3,4\}\) हों, तो \(A\times B\) का कौन-सा उपसमुच्चय फलन है?
If \(A=\{1,2\}\) and \(B=\{3,4\}\), which subset of \(A\times B\) is a function?
Explanation opens after your attempt
Correct Answer
A. ({(1,3),(2,4)})
Concept
In option (A), both (1) and (2) have exactly one image. In exams, a subset is a function only when the whole domain is covered.
Why this answer is correct
The correct answer is A. ({(1,3),(2,4)}). In option (A), both (1) and (2) have exactly one image. In exams, a subset is a function only when the whole domain is covered.
Exam Tip
विकल्प (A) में (1) और (2) दोनों की ठीक एक छवि है। परीक्षा में उपसमुच्चय भी तभी फलन है जब पूरा प्रांत शामिल हो।
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