Rút gọn \(B\). A \(B = \frac{{\sqrt x + 1}}{{\sqrt x – 1}}\) B \(B = \frac{{\sqrt x – 1}}{{\sqrt x + 1}}\) C \(B = \frac{1}{{\sqrt x + 1}}\) D \(B = \frac{1}{{\sqrt x – 1}}\)
Rút gọn \(B\). A \(B = \frac{{\sqrt x + 1}}{{\sqrt x – 1}}\) B \(B = \frac{{\sqrt x – 1}}{{\sqrt x + 1}}\) C \(B …