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There have been 1 items by minhngoc03 (Search limited from 31-05-2020)
Posted by minhngoc03 on 19-12-2017 - 17:51 in Chuyên đề toán THCS
Anh chị giải hộ em bài này:
Có bao nhiêu số nguyên dương x<1009 thỏa mãn:
x^2 đồng dư 1(mod 144)