यदि \(A=\{1,2,3\}\) और \(B=\{a,b\}\) हों, तो कौन-सा संबंध फलन है पर एक-एक नहीं है?
If \(A=\{1,2,3\}\) and \(B=\{a,b\}\), which relation is a function but not one-one?
Explanation opens after your attempt
Correct Answer
A. ({(1,a),(2,a),(3,b)})
Concept
In option (A), every domain element has one image, but (1) and (2) both have image (a). In exams, test function and one-one separately.
Why this answer is correct
The correct answer is A. ({(1,a),(2,a),(3,b)}). In option (A), every domain element has one image, but (1) and (2) both have image (a). In exams, test function and one-one separately.
Exam Tip
विकल्प (A) में हर प्रांत तत्व की एक छवि है पर (1) और (2) दोनों की छवि (a) है। परीक्षा में फलन और एक-एक की जांच अलग करें।
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