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Cho đồ thị (P): y = (m – 1)x2 với m  1. a) Xác định giá trị của m để đồ thị (P) đi qua điểm A(2 ; –6). Vẽ (P) với m tìm được. b) Tìm m để đồ thị (P) cắt đường thẳng (D): y = – x + 6 tại điểm có tung độ là 8. Vẽ (P) với m tìm được.
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