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2 năm trước
Bài 1 ( 2,0 điểm ) . Cho hàm số y = -3x + 2x + 1 ( và đường thẳng A : y = x - 1 . a ) Lập bảng biến thiên và vẽ đồ thị ( P ) của hàm số ( 1 ) . b ) Tìm tọa độ giao điểm của parabol ( P ) và đường thẳng
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