Cho hàm số y = f(x) xác định trên các đoạn [-7 ; 7...
Câu hỏi: Cho hàm số y = f(x) xác định trên các đoạn [-7 ; 7], đồ thị của nó là các đoạn thẳng được biểu diễn bởi hình bên. Khẳng định nào sau đây sai?![](data:image/png;base64,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)
A. Hàm số nghịch biến trên khoảng (-7 ; 7)
B. Hàm số đại giá trị nhỏ nhất trên khoảng (−7; 7) là -4
C. Hàm số là hàm hằng trên đoạn [-7; -3]
D. \(f(x) = - \frac{4}{3}x,\forall x \in \left[ { - 3;3} \right]\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi giữa HK1 môn Toán Đại 10 năm 2020 Trường THPT Nguyễn Hiền