Toán Lớp 8: Thực hiện phép tính :
a) $\frac{x-5}{x+1}$ + $\frac{x+7}{x+1}$
b) $\frac{1}{x+1}$ + $\frac{1}{x-1}$ + ² $\frac{2x}{x²-1}$
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Toán Lớp 8: Thực hiện phép tính :
a) $\frac{x-5}{x+1}$ + $\frac{x+7}{x+1}$
b) $\frac{1}{x+1}$ + $\frac{1}{x-1}$ + ² $\frac{2x}{x²-1}$
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