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Mathematics, 13.08.2021 16:50 Justadumbemo
Trên tập hợp số nguyên Z, xét quan hệ hai ngôi S như sau: aSb a b chia hết cho 7, với mọi a, b Z. Chứng minh S là một quan hệ tương đương.
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Trên tập hợp số nguyên Z, xét quan hệ hai ngôi S như sau: aSb a b chia hết cho 7,
với mọi a, b...
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