Cho hàm số y = f(x) có đồ thị như hình vẽ bên dưới...
Câu hỏi: Cho hàm số y = f(x) có đồ thị như hình vẽ bên dưới.![](data:image/png;base64,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)
A. Vô số.
B. 4
C. 0
D. 3
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 cụm 8 Trường Chuyên ĐB Sông HồngA. Vô số.
B. 4
C. 0
D. 3
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 cụm 8 Trường Chuyên ĐB Sông Hồng