Rút gọn M=(√x/√x−1):(2/x−2−x/x√x+x) với x≥0 và x≠1
Giải thích
\(M = \left[ {\frac{{\sqrt x (\sqrt x + 1)}}{{(\sqrt x - 1)(\sqrt x + 1)}} + \frac{{\sqrt x }}{{x - 1}}} \right]:\left[ {\frac{{2(\sqrt x + 1)}}{{x(\sqrt x + 1)}} - \frac{{2 - x}}{{x(\sqrt x + 1)}}} \right]\)
\(M = \frac{{x + \sqrt x + \sqrt x }}{{x - 1}}:\frac{{2\sqrt x + 2 - 2 + x}}{{x(\sqrt x + 1)}}\)
\(M = \frac{{x + 2\sqrt x }}{{x - 1}}:\frac{{x + 2\sqrt x }}{{x(\sqrt x + 1)}}\)
\(M = \frac{{x + 2\sqrt x }}{{x - 1}} \cdot \frac{{x(\sqrt x + 1)}}{{x + 2\sqrt x }}\)
\(M = \frac{{x(\sqrt x + 1)}}{{(\sqrt x - 1)(\sqrt x + 1)}}\)
\(M = \frac{x}{{\sqrt x - 1}}\)