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Toán 12: Cho hàm số y=f(x)=log_5(x^2+4x). Tìm tính đúng/sai
1 month ago
14
Đây là video về đúng sai:
Cho hàm số y=f(x)=log_5(x^2+4x)
Các mệnh đề sau đúng hay sai?
a) Tập xác định của hàm số là D=(-∞;-4)∪(0;+∞) Đ
b) f^' (x)=(2x+4)/(x^2+4x)log5
c) Hàm số y=f(x) nghịch biến trên (0;+∞)
d) Hàm số y=f(e^x ) đồng biến trên R
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