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groceval441995
2 năm trước
1 a) (x-4):(x+3) b) Tìm chữ số tận cùng của A biết A=137^14 2 Với n thuộc N,chứng tỏ rằng 5n+7 và 2n+3 là 2 số nguyên tố cùng nhau
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