Cho hàm số y = f(x) liên tục trên R và có bảng bi...
Câu hỏi: Cho hàm số y = f(x) liên tục trên R và có bảng biến thiên như hình vẽ bên. Khẳng định nào sau đây là sai ?![](data:image/png;base64,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)
A. f(x) nghịch biến trên khoảng \(\left( { - \infty ; - 1} \right)\)
B. f(x) nghịch biến trên khoảng (0;6)
C. f(x) nghịch biến trên khoảng \(\left( {3; + \infty } \right)\)
D. f(x) đồng biến trên khoảng (1; 3)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 Trường THPT Trần Hưng Đạo