\(A=\{1,2,3,4\}\) पर \(R=\{(a,b):a+2b=6\}\) में कितने युग्म हैं?
How many pairs are in \(R=\{(a,b):a+2b=6\}\) on \(A=\{1,2,3,4\}\)?
Explanation opens after your attempt
B. (2) युग्म(2) pairs
Concept
For (b=1), (a=4); for (b=2), (a=2). Thus ((4,1)) and ((2,2)) are the two pairs.
Why this answer is correct
The correct answer is B. (2) युग्म / (2) pairs. For (b=1), (a=4); for (b=2), (a=2). Thus ((4,1)) and ((2,2)) are the two pairs.
Exam Tip
(b=1) पर (a=4) और (b=2) पर (a=2) मिलता है। इसलिए ((4,1)) और ((2,2)) दो युग्म हैं।
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