Write the following sets in roster form :

$\mathrm{E} =$ The set of all letters in the world $\mathrm{TRIGONOMETRY}$

$E =$ The set of all letters in the word $TRIGONOMETRY$

There are $12$ letters in the word $TRIGONOMETRY,$ out of which letters $T,$ $R$ and $O$ are repeated

Therefore, this set can be written in roster form as

$E =\{ T , R , I , G , O , N , M , E , Y \}$

In rule method the null set is represented by

Write the following sets in roster form :

$A = \{ x:x$ is an integer and $ - 3 < x < 7\} $

In the following state whether $\mathrm{A = B}$ or not :

$A = \{ x:x$ is a multiple of $10\} ;B = \{ 10,15,20,25,30 \ldots \ldots \} $

What universal set $(s)$ would you propose for each of the following :

The set of isosceles triangles

Write the following sets in the set-builder form :

${\rm{\{ 2,4,8,16,32\} }}$