Выбери правильные ответы

Выполни возведение в степень и умножение алгебраических дробей.

1. \(\bigg(\dfrac{2a}{7b}\bigg)^2 \cdot \dfrac{21b^4}{8a^3}=\) [ \(14a\) | \(\frac{14a}{3b^2}\) | \(\frac{3b^2}{14a}\) | \(3b^2\) ].
2. \(\bigg(\dfrac{a^2}{bc^3}\bigg)^2 \cdot \dfrac{b^3c^5}{a^2}=\) [ \(\frac{a^2b}{c}\) | \(\frac{c}{a^2b}\) | \(\frac{ab^2}{c^2}\) | \(\frac{c^2}{ab^2}\) ].
3. \(\dfrac{z^5}{x^4y^6} \cdot \bigg(\dfrac{xy^2}{z^3}\bigg)^3=\) [ \(xz^4\) | \(\frac{1}{xz^4}\) | \(\frac{x}{z^4}\) | \(\frac{x^4}{z}\) ].
4. \(\dfrac{c^4}{a^6b^5} \cdot \bigg(\dfrac{a^2b^3}{c}\bigg)^3=\) [ \(c^4b\) | \(cb^4\) | \(\frac{c^4}{b}\) | \(\frac{c}{b^4}\) ].