📘 set theory and relations
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Set Theory Relations
1. Дано множини: $A=\{1,2,3\}$, $B=\{2,3,4,5\}$, $C=\{2,6\}$. Знайти множини:
- $B\setminus A = \{x \mid x \in B \text{ і } x \notin A\} = \{4,5\}$