\(समुच्चय (A={1,2,3,4}) पर (R={(a,b):a+b\) is even}) है। ([1]) तुल्यता वर्ग क्या है?
\(On (A={1,2,3,4}), (R={(a,b):a+b\) is even}). What is the equivalence class ([1])?
Explanation opens after your attempt
Correct Answer
A. ({1,3})
Concept
(1+b) is even only when (b) is odd. Therefore ([1]={1,3}).
Why this answer is correct
The correct answer is A. ({1,3}). (1+b) is even only when (b) is odd. Therefore ([1]={1,3}).
Exam Tip
(1+b) सम तभी होगा जब (b) विषम हो। इसलिए ([1]={1,3}) है।
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