Ononot — Let \{Ai\}{i \in I} and \{Bj\}{j \in J} be two families of s

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Set Theoryhard

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Let $\{A_i\}_{i \in I}$ and $\{B_j\}_{j \in J}$ be two families of subsets of a universal set $U$ . Which of the following is equivalent to the set difference of their unions, $\left( \bigcup_{i \in I} A_i \right) \setminus \left( \bigcup_{j \in J} B_j \right)$ ?