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Mathematics 8 Online
OpenStudy (blackfireskull):

If A = {1, 2, 3} and B = {1, 2, 3, 4, 5, 6, 7, 8} then A ∪ B Ø {1, 2, 3, 4, 5, 6, 7, 8} {1, 2, 3}

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