यदि \(f=\{(1,2),(2,3),(3,4)\}\) को \(A=\{1,2,3,4\}\) से \(B=\{2,3,4,5\}\) में relation माना जाए, तो यह (A) से (B) में फलन क्यों नहीं है?
Explanation opens after your attempt
A. \(4\in A\) की कोई image नहीं है\(4\in A\) has no image
Concept
Every element of (A) must have an image, but (4) is missing. An unused element of the codomain does not make a function invalid.
Why this answer is correct
The correct answer is A. \(4\in A\) की कोई image नहीं है / \(4\in A\) has no image. Every element of (A) must have an image, but (4) is missing. An unused element of the codomain does not make a function invalid.
Exam Tip
(A) के हर element की image होनी चाहिए, लेकिन (4) missing है। codomain का कोई unused element होना function को गलत नहीं बनाता।
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