यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a+b<5\}\) है, तो कौन-सा pair (R) में नहीं है?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a+b<5\}\), which pair is not in (R)?
Explanation opens after your attempt
D. ( (4,2) )
Concept
Here (4+2=6), and (6<5) is false. Therefore, ( (4,2) ) is not in the relation.
Why this answer is correct
The correct answer is D. ( (4,2) ). Here (4+2=6), and (6<5) is false. Therefore, ( (4,2) ) is not in the relation.
Exam Tip
(4+2=6) है और (6<5) असत्य है। इसलिए ( (4,2) ) relation में नहीं है।
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