Descriptive form:

Question

Descriptive form: The set of natural numbers greater than or equal to 6

 and less than or equal to 8

.

Answer 1

{x | x ∈ N ∧ 6 ≤ x ≤ 8}

Answer 2

Natural numbers don't have fractions or decimals.

The solution to this would be {6,7,8}