If n(A)=n, then what is the number of the non empty subsets of A.

Question

 What is the number of the non empty subsets of A, If n(A)=n?

Answer 1

There is only ONE empty subset of A. Therefore, all other subsets are non-empty.

 

The number of non-empty subsets is one less than the number of subsets of A.

 

Can you write this as an expression?