Question: If U1, U2 are universal sets with A, B U1, and C, D . U2, prove that (A 5) (C D)

If °U1, °U2 are universal sets with A, B ⊂ °U1, and C, D ⊂. °U2, prove that (A ∩ 5) × (C ∩ D) = (A × C) ∩ (B × D).

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