How do you prove that for all sets A, B and C, (A∪B) \C = (A\C) ∪ (B \C)?
How would you prove that if A, B, C, and D are sets, then (A ∩ B) X (C ∩ D) = (A X C) ∩ (B X D)?
איך מוכיחים שלכל קבוצות A, B ו-C, (A∪B) \C = (A\C) ∪ (B \C)?
כיצד תוכיח שאם A, B, C ו-D הם קבוצות, אז (A ∩ B) X (C ∩ D) = (A X C) ∩ (B X D)?