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dieulinh080611
2 năm trước
Viết công thức hàm y = f(x) biết y tỉ lệ thuận vs x theo hệ số tỉ lệ k = 1/4 a) Tìm x để f(x) = -5 b) Chứng tỏ rằng nếu : x1 > x2 => f(x1) > f(x2)
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