यदि \(f:{1,2,3}\to{1,4,9,16}\) और (f(x)=x-2) है, तो (16) की पूर्वछवि के बारे में क्या सही है?
If \(f:{1,2,3}\to{1,4,9,16}\) and (f(x)=x-2), what is true about the preimage of (16)?
Explanation opens after your attempt
Correct Answer
A. इसकी कोई पूर्वछवि नहीं हैIt has no preimage
Concept
(4) is not in the domain, so (16) is not obtained. In exams, a preimage must come from the domain only.
Why this answer is correct
The correct answer is A. इसकी कोई पूर्वछवि नहीं है / It has no preimage. (4) is not in the domain, so (16) is not obtained. In exams, a preimage must come from the domain only.
Exam Tip
प्रांत में (4) नहीं है इसलिए (16) प्राप्त नहीं होता। परीक्षा में पूर्वछवि केवल प्रांत से ही ली जाती है।
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