Cho hàm số \(y=f(x)\) liên tục và xác định trên R...
Câu hỏi: Cho hàm số \(y=f(x)\) liên tục và xác định trên R và có đồ thị như hình vẽ![](data:image/png;base64,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)
A. 5
B. Vô số
C. 7
D. 6
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi HSG môn Toán 12 năm 2019 Trường THPT Thuận Thành 2