Question

Use set builder notation to represent the following set.

{... -3, -2, -1, 0}
{x | x ∈ I, x ≤ 0}
{x | x ∈ N, x ≤ 0}
{x | x ∈ R, x ≤ 0}

Answer 1

What is the set I?
The set {...,-2,-1,0} is not a set {x|\[x \in N,x \le 0\]} and {x|\[x \in R\], \[x \le 0\]}

Answer 2

so it cant be the second and third?

Answer 3

yup, it is a set {x|\[x \in Z, x \le 0\]}

Answer 4

I don't know what a set I is, for my educational programs, a set I is known as a set R or C