Cho a, b, c là số nguyên dương, chứng minh USCLN (a, b, c) = USCLN(a, b, c)*abc/ USCLN(a, b)*USCLN(b, c)*USCLN(c, a)

bị đóng vì bị trùng bởi Đức Vỹ 11-10-14 08:55 AM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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