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Toán 12: Cho hàm số f(x)=ax^3+bx^2+cx+d có đồ thị như hình vẽ
2 months ago
124
Nhận định đúng/sai
a) Giá trị cực đại của hàm số đã cho là 2
b) Phương trình ax^3+bx^2+cx+d +1=0 có ba nghiệm phân biệt.
c) Phương trình ax^3+bx^2+cx+d -1=0 có hai nghiệm thực dương
d) Phương trình ax^3+bx^2+cx+d + 3=0 vô nghiệm
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