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माना A={1,2,3,4} है यदि f:AtoA एक एकैकी...

माना `A={1,2,3,4}` है यदि `f:AtoA` एक एकैकी फलन है तथा सभी `x inA` के लिए `f(x)!=x` है तो ऐसे संभव फलनों की संख्या है

A

6

B

9

C

24

D

44

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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