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Saraanh
2 năm trước
y= x $x^{2}$ +x-2 a, lập bbt và vẽ đthi( đã làm đc) b, dùng đthi hoặc bbt để tìm tham số m để pt x $x^{2}$ +x-2 =m có 2 nghiệm x1, x2 pb thoả mãn x1<0<x2<1
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