Toán Lớp 6: Tìm n€Z , biết :
A) (n-9)÷( n-3)
B) (n²+5n+7)÷n+5
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Toán Lớp 6: Tìm n€Z , biết :
A) (n-9)÷( n-3)
B) (n²+5n+7)÷n+5
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