номер 66 гдз 8 класс алгебра Муравин Муравина

1) \begin{equation}\frac{\frac{b}{a}}{2a} \end{equation} \begin{equation}\frac{b}{a}:2a=\frac{b}{a}\cdot \frac{1}{2a}=\frac{b}{2a^{2}} \end{equation} 2)\begin{equation}\frac{ab}{\frac{3b}{2a}} \end{equation} \begin{equation}ab:\frac{3b}{2a}=ab\cdot \frac{2a}{3b}=\frac{2a^{2}}{3} \end{equation} 3)\begin{equation}\frac{\frac{5}{n}}{5n} \end{equation} \begin{equation}\frac{5}{n}:5n=\frac{5}{n}\cdot \frac{1}{5n}=\frac{1}{n^{2}} \end{equation} 4)\begin{equation}\frac{x^{3}y}{\frac{x^{2}y}{10}} \end{equation} \begin{equation}x^{3}y:\frac{x^{2}y}{10}=x^{3}y\cdot \frac{10}{x^{2}y}=10x \end{equation} 5)\begin{equation}\frac{\frac{4n^{3}k}{9p}}{2nk^{2}} \end{equation} \begin{equation}\frac{4n^{3}k}{9p}:2nk^{2}= \end{equation} \begin{equation}=\frac{4n^{3}k}{9p}\cdot \frac{1}{2nk^{2}}=\frac{2n^{2}}{9pk} \end{equation} 6)\begin{equation}\frac{x^{4}y}{\frac{4x^{3}}{3y^{2}}} \end{equation} \begin{equation}x^{4}y:\frac{4x^{3}}{3y^{2}}=x^{4}y\cdot \frac{3y^{2}}{4x^{3}}=\frac{3y^{3}x}{4} \end{equation}