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cea18823
2 năm trước
B= ($\frac{1-x}{2-x}$- $\frac{5}{2+x}$- $\frac{3x^{2}-8}{x^{2}-4}$):($\frac{1}{2-x}$-$\frac{1}{2+x}$ ) Tìm giá trị nhỏ nhất của biểu thức B
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