Cho hàm số \(y=f(x)\) có bảng biến thiên như hình...
Câu hỏi: Cho hàm số \(y=f(x)\) có bảng biến thiên như hình vẽ. ![](data:image/png;base64,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)
A. 13
B. 7
C. \(f(2)-2\)
D. 2
Câu hỏi trên thuộc đề trắc nghiệm
40 câu trắc nghiệm Các dạng toán về hàm ẩn liên quan đến GTLN, GTNN của hàm số