Bảng xét dấu sau là của biểu thức nào?
Câu hỏi: Bảng xét dấu sau là của biểu thức nào?![](data:image/png;base64,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)
A. f(x) = - x + 2
B. f(x) = x + 2
C. f(x) = - x - 2
D. f(x) = x - 2
Câu hỏi trên thuộc đề trắc nghiệm
Đề kiểm tra 1 tiết Chương 4 Đại số 10 Trường THPT Bùi Thị Xuân - Lâm Đồng năm 2018