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. (2; 3)
B. (1; 2)
C. (3; 4)
D. \(\left( { - \infty ;1} \right)\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 cụm 8 Trường Chuyên ĐB Sông Hồng