I know or at least correct me if I'm wrong two elements are {3,2}. How would I come to find another element?
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1What do you mean by S[4] – Tojra May 13 '19 at 02:08
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sorry it should just be [4] – Eve M May 13 '19 at 02:16
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What does it mean now? – Tojra May 13 '19 at 02:17
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where a in S is 4: |4-b|<2 or |4-b|=2 – Eve M May 13 '19 at 02:20
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1The 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 '19 at 02:55