Cho hàm số y=ax4+bx2+c có đồ...
Câu hỏi: Cho hàm số y=ax4+bx2+c có đồ thị như hình vẽ bênMệnh đề nào dưới đây đúng?![](data:image/png;base64,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)
A a>0, b<0, c>0
B a<0, b>0, c<0
C a<0, b<0, c<0
D a>0, b<0, c<0
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán trường THPT Chuyên ĐHSP - Hà Nội - lần 2 - năm 2017 ( có lời giải chi tiết)