Question

A= x/x is a natural number divided by 9 and in roaster form​

Answer 1

Given :-

A = { x | x is a natural number divided by 9 }

To Find :-

The Given set in Roster Form .

Used Concepts :-

• Roster Form is also known as tabular form.
• In roster form we write all elements of a set in braces separating from commas .
• The set can be finite or infinite .
• The sign " | " can also be written as " : " and read as " such that "

Solution :-

As , the set of All natural numbers divided by 9 is infinite . So , we will write only few elements of the set and then write some dots which represents that this series is going to infinity .

Some natural numbers that are divisible by 9 are 9 , 18 , 27 , 36 . So ,

A = { 9 , 18 , 27 , 36 , . . . . . . .}

Now , we are Done :D