Total no. of functions

Total number of functional groups present in following compound:

Total number of functional groups in following compound is:

The total number of functions from A to itself is 256, then n(A)=

The total number of functions from A to itself is 256, then n(A)=

The total number of functions from A to itself is 256, then n(A)=

Total number of functional groups present in the given following compound :

Let A and B be any two sets such that n(B)=P, n(A)=q then the total number of functions f: A -> B is equal to