Question

Express each of the following sets in set-builder notation (form):

(vi) $\{23,25,27,29,\dots \}$

Answer 1

Step: Expressing the given set in set-builder form

In set builder method the actual elements of the set are not written, but a rule or a statement or a formula is written in the briefest possible way.

$\text{Given set}=\{23,25,27,29,\dots \dots \}$

We can see that the elements of given set are odd numbers starting from 23.

Hence, the set-builder form is
$\{x:x\text{is an odd number and}x\ge 23\}$