Cho hàm số y = f(x) có đồ thị. Hàm số đã cho đạt c...
Câu hỏi: Cho hàm số y = f(x) có đồ thị. Hàm số đã cho đạt cực đại tại![](data:image/png;base64,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)
A. x = -1
B. x = 2
C. x = 1
D. x = -2
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2018-2019 môn Toán Trường THPT Chuyên KHTN - Hà Nội