State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $2x - 1 = 0\} $
Which set is the subset of all given sets
If $Q = \left\{ {x:x = {1 \over y},\,{\rm{where \,\,}}y \in N} \right\}$, then
Write the following intervals in set-builder form :
$\left[ {6,12} \right]$
In each of the following, determine whether the statement is true or false. If it is true, prove it. If it is false, give an example.
If $A \subset B$ and $B \in C,$ then $A \in C$