Cho parabol (P): \(y = a{x^2} + bx + c\) có đồ thị...
Câu hỏi: Cho parabol (P): \(y = a{x^2} + bx + c\) có đồ thị như hình bên. Phương trình của parabol này là:![](data:image/png;base64,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)
A \(y = 2{x^2} - 4x - 1\)
B \(y = 2{x^2} + 3x - 1\)
C \(y = 2{x^2} + 8x - 1\)
D \(y = 2{x^2} - x - 1\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi HKI môn Toán lớp 10 - Đề số 2 - Có lời giải chi tiết