The notation is {5x | x ∈ Z, 1 < x < 20}
Set-builder notation is a representation used to write and represent the elements of sets, often for sets with an infinite number of elements. It is used with common types of numbers, such as integers, real numbers, and natural numbers.
standard form to write notation is:
{xI condition1, condition2, ...}
first condition is five times the value of integers
From the set of integers,
5x ∈ Z
second condition is integers greater than 1 and less than 20,
1< x < 20
Hence, {5x | x ∈ Z, 1 < x < 20}.
Learn more about this concept here:
https://brainly.com/question/17238769
#SPJ1
