Bảng biến thiên dưới đây là của hàm số nào?
Câu hỏi: Bảng biến thiên dưới đây là của hàm số nào?![](data:image/png;base64,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)
A. y = −x 2 + 2x − 3
B. y = m (m là tham số)
C. y = 2020x - 2021
D. y = -2020x + 1
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi giữa HK1 môn Toán Đại 10 năm 2020 Trường THPT Nguyễn An Ninh