Cho hàm số y = f(x) có bảng biến thiên như sau:
Câu hỏi: Cho hàm số y = f(x) có bảng biến thiên như sau:![](data:image/png;base64,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)
A. 1
B. 2
C. 3
D. 4
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 Trường THPT Kim Liên- Hà NộiA. 1
B. 2
C. 3
D. 4
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 Trường THPT Kim Liên- Hà Nội