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banhbaocaixanh
2 năm trước
Cho các số thực không âm a, b, c thỏa mãn a + b + c = 1. Tìm GTLN, GTNN của biểu thức P = (ab + bc + ca - abc)/(a + 2b + c). GIÚP MÌNH ĐI MÀ CÁC BẠN ƠI !!!!
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