\[\left( \frac{3}{4}cd^{2} \right)^{2} = \left( \frac{3}{4} \right)^{2}\left( cd^{2} \right)^{2} =\]
\[= \frac{9}{16}c^{2}d^{4} \Longrightarrow коэффициент\ 9;\ \ \]
\[степень\ 6.\]