Cho hàm số y = f(x) xác định, liên tục trên R và c...
Câu hỏi: Cho hàm số y = f(x) xác định, liên tục trên R và có bảng biến thiên như sau:![](data:image/png;base64,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)
A. 1
B. 2
C. 3
D. 0
Câu hỏi trên thuộc đề trắc nghiệm
Đề tập huấn thi THPTQG môn Toán năm 2019 Sở GD&ĐT TP. Hồ Chí Minh - Đề số 1