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Hangnguyena7
2 năm trước
Bài 3: Cho hàm số y = 2x; y = -3x a) vẽ hai đồ thị trên cùng một hệ trục tọa độ b) Vẽ một đường thẳng song song với trục Oy cắt trục Ox tại điểm có hoàng độ bằng -1, đường thẳng đó cắt hai đồ thị trên tại hai điểm A, B. Xác định tọa độ A và B c) Tính chu vi tam giác AOB, tính diện tích tam giác AOB
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