consider the set A containing n elements .Then the total number of injective functions from A onto itself is
Hi,
Lets consider the case of total number of one to one function from a set of m elements to a set of n elements
Now if m = n then total number of injective functions from A onto itself is
= n!/0! = n!
so answer is n!
Lets consider the case of total number of one to one function from a set of m elements to a set of n elements
Now if m = n then total number of injective functions from A onto itself is
= n!/0! = n!
so answer is n!