Question

Write the following set in set-builder representation. $B=\{1,3,5,7,9\}$

Answer 1

Given that, B = {1, 3, 5, 7, 9}

Here, all the elements of the set are natural numbers. Also, they are all odd and less than 10.

So, B is a set of all odd natural numbers less than 10.

$\therefore$ The set builder form of the set B is: B = {x: x is an odd natural number less than 10}