यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a=b\}\) है, तो (R) में कितने pairs होंगे?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a=b\}\), how many pairs will be in (R)?
Explanation opens after your attempt
C. (4)
Concept
When (a=b), the pairs are ( (1,1),(2,2),(3,3),(4,4) ). In identity relation, the number of pairs is (n(A)).
Why this answer is correct
The correct answer is C. (4). When (a=b), the pairs are ( (1,1),(2,2),(3,3),(4,4) ). In identity relation, the number of pairs is (n(A)).
Exam Tip
(a=b) होने पर pairs ( (1,1),(2,2),(3,3),(4,4) ) हैं। पहचान relation में pairs की संख्या (n(A)) होती है।
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