Cho hàm số y = f (x) ...
Câu hỏi: Cho hàm số y = f (x) xác định trên R \ {1} liên tục trên mỗi khoảng xác định và có bảng biến thiên như sau:![](data:image/png;base64,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)
A. \(\left( { - \infty ; - 1} \right)\)
B. \(\left( { - \infty ; 2} \right)\)
C. (-1; 2)
D. \(\left( { - \infty ; 1} \right)\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi HK2 môn Toán 12 Trường THPT Phạm Công Bình - Vĩnh Phúc năm học 2017 - 2018