Cho hàm số y = ax 2 + bx + c có đồ thị...
Câu hỏi: Cho hàm số y = ax 2 + bx + c có đồ thị như hình dưới đây. Mệnh đề nào sau đây đúng?![](data:image/png;base64,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)
A. a > 0, b = 0, c > 0
B. a > 0, b < 0, c > 0
C. a > 0, b > 0, c > 0
D. a < 0, b > 0, c > 0
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi giữa HK1 môn Toán Đại 10 năm 2020 Trường THPT Nguyễn Hiền