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Dphuong2019
2 năm trước
cho ba hàm số : y = 1/2 x ² ; y = x ² ; y = 2x ² a) vẽ đồ thị hàm số của ba hàm số này trên cùng một mặt phẳng tạo độ b) tìm ba điểm A,B,C có cùng hoành độ x = -1,5 theo thứ tự nằm trên ba đồ thị. Xác ddingj tung độ tương ứng của chúng c) tìm ba điểm A',B',C' có cùng hoành độ x = 1,5 theo thứ tự nằm trên ba đồ thị. kiểm tra tính đối xứng của A vả A', B và B' , C và C' d) với mỗi hàm số trên , hãy tìm giá trị của x để hàm số đó có giá trị nhỏ nhất
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