That is where my problem lies in the induction proof:
I know to begin with the case n=2 so proving the basic counting principle.
Then I assume true for for n and take an n+1 element set and prove its true.
I am just struggling to write out a formal proof
Is that a statement? Or is it a question?
Why not learn to post in symbols? You can use LaTeX tags
[tex]\|A\|[/tex] gives