यदि (R) संबंध \(A=\{1,2,3,4\}\) पर (aRb) तभी हो जब (a-b) सम संख्या हो तो (R) में कौन सा युग्म होगा?

If (R) is a relation on \(A=\{1,2,3,4\}\) where (aRb) only when (a-b) is even, which pair belongs to (R)?

Explanation opens after your attempt
Correct Answer

C. \((1,3)\)

Step 1

Concept

Since (1-3=-2) is even, \((1,3)\in R\). In parity questions, check the parity of the difference.

Step 2

Why this answer is correct

The correct answer is C. \((1,3)\). Since (1-3=-2) is even, \((1,3)\in R\). In parity questions, check the parity of the difference.

Step 3

Exam Tip

(1-3=-2) सम है इसलिए \((1,3)\in R\) है। समता वाले प्रश्नों में अंतर की parity जांचें।

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Mathematics Answer, Explanation and Revision Hints

यदि (R) संबंध \(A=\{1,2,3,4\}\) पर (aRb) तभी हो जब (a-b) सम संख्या हो तो (R) में कौन सा युग्म होगा? / If (R) is a relation on \(A=\{1,2,3,4\}\) where (aRb) only when (a-b) is even, which pair belongs to (R)?

Correct Answer: C. \((1,3)\). Explanation: (1-3=-2) सम है इसलिए \((1,3)\in R\) है। समता वाले प्रश्नों में अंतर की parity जांचें। / Since (1-3=-2) is even, \((1,3)\in R\). In parity questions, check the parity of the difference.

Which concept should I revise for this Mathematics MCQ?

Since (1-3=-2) is even, \((1,3)\in R\). In parity questions, check the parity of the difference.

What exam hint can help solve this Mathematics question?

(1-3=-2) सम है इसलिए \((1,3)\in R\) है। समता वाले प्रश्नों में अंतर की parity जांचें।