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dinhtrung200111
2 năm trước
rút gọn biểu thức sau a, $\frac{1}{x-3}$+2- $\frac{5}{x-1}$-x b, $\frac{x+2}{x-2}$- $\frac{1}{x}$- $\frac{2}{x(x-2)}$ c, $\frac{3x-1}{x-1}$- $\frac{2x+5}{x-3}$-1 d, $\frac{x+3}{x+1}$+ $\frac{x-2}{x}$ -2
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