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kyhamgyuhao0908
2 năm trước
Cho phương trình x^2 -2 (m+1)x+m-4=0 A,Giải pt khi m=1 B,CMR pt luôn có 2 nghiệm phân biệt với V giá trị của M C,CMR : bt A :x1(1-x2)+x2(1-x1) ko phụ thuộc m
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