A. \( \left\{ {\begin{array}{*{20}{l}} {x > 0}\\ {x \ne 4}\\ x\ne 2 \end{array}} \right.\)
B. \( \left\{ {\begin{array}{*{20}{l}} {x > 0}\\ {x \ne 4} \end{array}} \right.\)
C. \( \left\{ {\begin{array}{*{20}{l}} {x \ge 0}\\ {x \ne 2} \end{array}} \right.\)
D. \( \left\{ {\begin{array}{*{20}{l}} {x \ge 0}\\ {x \ne 4} \end{array}} \right.\)
B
\(\begin{array}{l} {\rm{P}} = \left( {\frac{{4\sqrt x }}{{2 + \sqrt x }} + \frac{{8x}}{{4 - x}}} \right):\left( {\frac{{\sqrt x - 1}}{{x - 2\sqrt x }} - \frac{2}{{\sqrt x }}} \right) = \left( {\frac{{4\sqrt x }}{{2 + \sqrt x }} + \frac{{8x}}{{4 - x}}} \right):\left( {\frac{{\sqrt x - 1}}{{\left( {\sqrt x - 2} \right)\sqrt x }} - \frac{2}{{\sqrt x }}} \right)\\ ĐKXĐ:\\ \left\{ {\begin{array}{*{20}{l}} {x \ge 0}\\ {\sqrt x \ne 0}\\ {4 - x \ne 0}\\ {\sqrt x - 2 \ne 0} \end{array} \Leftrightarrow \left\{ {\begin{array}{*{20}{l}} {x > 0}\\ {x \ne 4} \end{array}} \right.} \right. \end{array}\)
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