V
vuhoang97
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![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
cho phương trình bậc 3:
x^3 - (2m-1)x^2 + (m^2 - 3m -2)x + 2m^2 + 2m=0 (1)
1, Xác định m để (1) có đúng 2 nghiệm
2, Xác định m để (1) có 3 nghiệm phân biệt : x1 ; x2 ; x3
sao cho S= x1^2 + x2^2 + x3^2 đạt giá trị nhỏ nhất
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@};-
x^3 - (2m-1)x^2 + (m^2 - 3m -2)x + 2m^2 + 2m=0 (1)
1, Xác định m để (1) có đúng 2 nghiệm
2, Xác định m để (1) có 3 nghiệm phân biệt : x1 ; x2 ; x3
sao cho S= x1^2 + x2^2 + x3^2 đạt giá trị nhỏ nhất
@};-
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