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rainhoang1357
2 năm trước
1) 1)Cho A=n ²+n+1 với n ∈ N Cmr A là một số không chính phương 2)Cho f(x)=10x ²-7x+5 g(x)=2x-3 Tìm x ∈ N để f(x) chia hết cho g(x)
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