Cho hàm số y = f(x) liên tục trên R và có bảng biế...
Câu hỏi: Cho hàm số y = f(x) liên tục trên R và có bảng biến thiên như hình vẽ.![](data:image/png;base64,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)
A. \(\left[ {0;\frac{1}{2}} \right]\)
B. \(\left( {0;\frac{1}{2}} \right]\)
C. \(\left( {\frac{1}{4};\frac{1}{2}} \right]\)
D. \(\left( {\frac{{ - 2 + \sqrt 2 }}{4};\frac{1}{4}} \right)\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 Trường THPT Kim Liên- Hà Nội