Tính:\(\begin{array}{l}
a)\,\,\frac{x}{y}\sqrt {\frac{{{x^2}}}{{{y^4}}}} \,\,\left( {x > 0,y \ne 0} \right)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b)\,\,5xy\sqrt {\frac{{25{x^2...

A \(\begin{array}{l}
a)\,\,\frac{{{x^2}}}{{{y^3}}} & & & b)\,\,  \frac{{25{x^2}}}{y}\\
c)\,\, - \sqrt 3 & & d)\,\,\frac{{3 + 2a}}{{ - b}}
\end{array}\)

B \(\begin{array}{l}
a)\,\,\frac{{{x^2}}}{{{y^3}}} & & & b)\,\, - \frac{{25{x^2}}}{y^2}\\
c)\,\, - \sqrt 3 & & d)\,\,\frac{{3 + 2a}}{{ - b}}
\end{array}\)

C \(\begin{array}{l}
a)\,\,\frac{{{x^2}}}{{{y^3}}} & & & b)\,\, - \frac{{25{x^2}}}{y}\\
c)\,\,  \sqrt 3 & & d)\,\,\frac{{3 + 2a}}{{ - b}}
\end{array}\)

D \(\begin{array}{l}
a)\,\,\frac{{{x^2}}}{{{y^3}}} & & & b)\,\, - \frac{{25{x^2}}}{y}\\
c)\,\,  -\sqrt 3 & & d)\,\,\frac{{3 + 2a}}{{ b}}
\end{array}\)