यदि \(A=\{1,2,3\}\), \(B=\{x,y\}\) और \(R=\{(1,x),(3,y)\}\) हो, तो (R) फलन क्यों नहीं है?
If \(A=\{1,2,3\}\), \(B=\{x,y\}\), and \(R=\{(1,x),(3,y)\}\), why is (R) not a function?
Explanation opens after your attempt
Correct Answer
A. क्योंकि (2) की कोई छवि नहीं हैBecause (2) has no image
Concept
Every element of (A) must have exactly one image in a function, but (2) is missing. In exams, compare first components with the whole domain.
Why this answer is correct
The correct answer is A. क्योंकि (2) की कोई छवि नहीं है / Because (2) has no image. Every element of (A) must have exactly one image in a function, but (2) is missing. In exams, compare first components with the whole domain.
Exam Tip
फलन में (A) के हर तत्व की ठीक एक छवि होनी चाहिए, पर (2) छूट गया है। परीक्षा में पहले घटकों को पूरे प्रांत से मिलाएं।
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