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duongthuyanhlibra6789
2 năm trước
Bài 1 : Tìm số tự nhiên nhỏ nhất sao cho khi chia cho 11 dư 6 , chia 4 dư 1 và chia 19 dư 11 Bà 2 : Chứng tỏ : A=10^n+18n-1 chia hết cho 27( với n là số tự nhiên )
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