Question

The total number of functions from A to itself is 256,
then n(A) =
1) 5
2)4
3) 2
4 )3​

Answer 1

Let n(A)=x
each element of x in domain can be mapped onto
each element of x in the range.
⇒ Total number of functions is x×x×...×x
⇒x
x
=256
⇒x=4

Answer 2

Answer:

n(A) is 4 that's what i got . clarify from others also and follow me