Cho đồ thị hàm số \(y = {x^3} - 3x + 1\). Tìm giá...
Câu hỏi: Cho đồ thị hàm số \(y = {x^3} - 3x + 1\). Tìm giá trị của m để phương trình \({x^3} - 3x - m = 0\) có ba nghiệm thực phân biệt.![](data:image/png;base64,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)
A \( - 2 < m < 3\)
B \( - 2 < m < 2\)
C \( - 2 \le m < 2\)
D \( - 1 < m < 3\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán trường THPT Chuyên Thái Nguyên - lần 2 - năm 2017 ( có lời giải chi tiết)