alleryCan the range differ from the codomain?
AYes it can
BNo it cannot
COnly if empty
DOnly if equal
Answer & Solution
Correct answer: A. Yes it can
1. The codomain is the whole of set B.
2. The range only gathers second elements actually used.
3. The range is the set of second elements, while the whole set B is the codomain.
4. So the answer is yes it can.
_Source: syllabus Mathematics, Ch 2 'Relations and Functions'_
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