Toán Lớp 10: C={1;2;4;5;8;10;16;20;40;80}
D={1;2;3;4;6;8;12;24}
=> C\D ??
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Toán Lớp 10: C={1;2;4;5;8;10;16;20;40;80}
D={1;2;3;4;6;8;12;24}
=> C\D ??
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