Write the following as intervals :
$\{ x:x \in R,3\, \le \,x\, \le \,4\} $
$\{ x:x \in R,3\, \le \,x\, \le \,4\} = \left[ {3,4} \right]$
List all the subsets of the set $\{-1,0,1\}.$
Write the following sets in the set-builder form :
$\{ 3,6,9,12\}$
Which of the following are examples of the null set
$\{ x:x$ is a natural numbers, $x\, < \,5$ and $x\, > \,7\} $
Which of the following pairs of sets are equal ? Justify your answer.
$A = \{ \,n:n \in Z$ and ${n^2}\, \le \,4\,\} $ and $B = \{ \,x:x \in R$ and ${x^2} – 3x + 2 = 0\,\} .$
Write down all the subsets of the following sets
$\{ 1,2,3\} $
