Question

Write the given set from Roster-form to set-builder form $J=\left\{2,3,5,7,11,13,17,19\right\}$

Answer 1

Set-Builder form-

When the elements are not listed but are described by a property possessed by all the elements of the set. The set

$J=\left\{2,3,5,7,11,13,17,19\right\}$ contain only prime numbers which are less than $20.$

$J=\{x:xisprimenumberlessthan20\}$.

Hence set in set-builder form is $J=\{x:xisprimenumberlessthan20\}$