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Toán 12: Cho hàm số y=f(x) có đồ thị như hình vẽ bên dưới. Nhận định đúng sai
2 months ago
28
a) Hàm số f(x) nghịch biến trên (-∞,-1)
b) Hàm số f(x) nghịch biến trên (2,∞)
c) Hàm số f(x) nghịch biến trên R
d) Hàm số f(x) có 2 điểm cực trị
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