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If (A={1,2}) and (B={3,4}), which subset of (A\times B) is a function?यदि (A={1,2}) और (B={3,4}) हों, तो (A\times B) का कौन-सा उपसमुच्चय फलन है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ({(1,3),(2,4)})({(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.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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