Cho hàm số y = f(x) có đồ thị như hình vẽ. Phương...
Câu hỏi: Cho hàm số y = f(x) có đồ thị như hình vẽ. Phương trình \(f(\left| {1 - 2x} \right|) = 0\) có tổng tất cả các nghiệm là: ![](data:image/png;base64,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)
A. 2
B. 1
C. 4
D. -2
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi giữa HK2 môn Toán 10 Trường THPT Lê Xoay - Vĩnh Phúc năm 2018 - 2019