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truc06082000
2 năm trước
cho hàm số y=(m-2)x+n(d) . Tìm m,n biết a)(d) đi qua 2 điểm A(-1;2) và B(3;-4) b) (d) cắt trục tung tại điểm có tung độ bằng 1- √2 và cắt trục hoành tại điểm có hoành độ bằng 2+ √2 c) (d) trùng với (d'): y=2x-3
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