SOLUTION: What is the elements and cardinality of: - set of counting numbers greater than 8? - set of counting numbers greater than 4?

set of counting numbers greater than 8?

{9,10,11,...}

set of counting numbers greater than 4?

{5,6,7,...}

The cardinality of both sets are infinite,

and that particular infinite cardinality is 
called aleph-null, and is written ℵ0

[Incidentally, the infinite cardinality of
the real numbers is called aleph-one, and
is written ℵ1]


Edwin