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Toán Lớp 8: B= ($\frac{2x+1}{x-1}$+ $\frac{8}{x^{2}-1}$- $\frac{x-1}{x+1}$). $\frac{x^{2}-1}{5}$ a.Rút gọn b.Chứng Minh : B>0 (vì x$\neq$+-1)

Home/ Toán Lớp 8: B= ($\frac{2x+1}{x-1}$+ $\frac{8}{x^{2}-1}$- $\frac{x-1}{x+1}$). $\frac{x^{2}-1}{5}$ a.Rút gọn b.Chứng Minh : B>0 (vì x$\neq$+-1)

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