# S = { (a,b) be elements of Real Numbers| |a-b|<2 or |a-b|=2}. List three elements in S[4]?

I know or at least correct me if I'm wrong two elements are {3,2}. How would I come to find another element?

• What do you mean by S[4] – Tojrah May 13 at 2:08
• sorry it should just be [4] – Eve M May 13 at 2:16
• What does it mean now? – Tojrah May 13 at 2:17
• where a in S is 4: |4-b|<2 or |4-b|=2 – Eve M May 13 at 2:20
• The class of $4$, $[4]$, consists of all numbers that are at distance $2$ of smaller from $4$. This is the closed interval $[2,6]$. – logarithm May 13 at 2:55