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Find the number of all onto function from set A=(1,2,3,4,.........n) to itself

Find the number of all onto function from set A=(1,2,3,4,.........n) to itself

Grade:12

1 Answers

Vikas TU
14149 Points
6 years ago
Dear Student,
As a rule we know number of onto function from a set to utself will be total permutation no of the no of elements.
        Here the element no is n all all of them are different.
        Therefore, total no of onto functions will definitely be n .
Cheers!!
Regards,
Vikas (B. Tech. 4th year
Thapar University)

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