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thanhloanvukh
2 năm trước
a) Tìm a ∈ Z biết : a2 + 5 ⋮ a2 + 2 b) Tìm x ∈ Z biết (x - 1) + (x - 2) + (x - 3) +…+ (x - 100) = - 5750 giúp mink với!
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