Let $A=\{a, e, i, o, u\}$ and $B=\{a, b, c, d\} .$ Is $A$ a subset of $B ?$ No. (Why?). Is $B$ a subset of $A ?$ No. (Why?)
Write down all the subsets of the following sets
$\{ a,b\} $
Write the following as intervals :
$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $
Write the following sets in the set-builder form :
$\{ 1,4,9 \ldots 100\} $
Write the following as intervals :
$\{ x:x \in R, - 4\, < \,x\, \le \,6\} $