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nghaiduong092
2 năm trước
Cho x, y thỏa mãn $x^2 - 2xy + 6y^2 - 12x + 2y + 41 = 0$ Tính giá trị biểu thức: $A = {2020 - 2019(9 - x - y)^{2019} - (x - 6y)^{2019} \over y^{1010}}$
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