Rút gọn \(B.\) A \(B = \frac{{\sqrt x }}{{\sqrt x + 1}}\) B \(B = \frac{{\sqrt x }}{{2\sqrt x + 1}}\) C \(B = \frac{{\sqrt x – 1}}{{\sqrt x + 1}}\) D \(B = \frac{{\sqrt x – 1}}{{2\sqrt x + 1}}\)
Rút gọn \(B.\) A \(B = \frac{{\sqrt x }}{{\sqrt x + 1}}\) B \(B = \frac{{\sqrt x }}{{2\sqrt x + 1}}\) C \(B = \frac{{\sqrt …