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On (A={1,2,3,4}), (R={(a,b):a+b\text{ is even}}). Why is (R) reflexive?(A={1,2,3,4}) पर (R={(a,b):a+b\text{ is even}}) है। (R) परावर्ती क्यों है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Because (a+a=2a) is always evenक्योंकि (a+a=2a) हमेशा सम होता है
Step 1: For reflexivity, put ((a,a)). Step 2: Then (a+a=2a), which is always even. Step 3: In such questions, check the self-pair, not a general pair first.चरण 1: परावर्ती जांच में ((a,a)) रखें। चरण 2: तब (a+a=2a) मिलता है, जो हमेशा सम है। चरण 3: ऐसे प्रश्न में सामान्य युग्म नहीं, अपने-आप वाला युग्म जांचें।
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