\(यदि (A={1,2,3}) पर (R={(a,b):a+b\) is odd}), तो कौन सा युग्म (R) में नहीं है?
\(If (R={(a,b):a+b\) is odd\(}) on (A={1,2,3}), which pair is not in (R)\)?
Explanation opens after your attempt
Correct Answer
D. ( (1,3) )
Concept
(1+3=4) is even, so \((1,3)\notin R\). In exams, an odd sum needs one odd and one even element.
Why this answer is correct
The correct answer is D. ( (1,3) ). (1+3=4) is even, so \((1,3)\notin R\). In exams, an odd sum needs one odd and one even element.
Exam Tip
(1+3=4) सम है, इसलिए \((1,3)\notin R\)। परीक्षा में odd sum के लिए एक odd और एक even अवयव चाहिए।
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