Question

1 пример не надо делать​

Answer 1

$\Big(\dfrac{a^{4} }{b^{5} }\Big)^{2}\cdot \Big(\dfrac{b^{6} }{a^{3} }\Big)^{2}:\Big(ab\Big) =\dfrac{a^{8} }{b^{10} }\cdot\dfrac{b^{12} }{a^{6} }\cdot\dfrac{1}{a\cdot b}=\dfrac{a^{8}\cdot b^{12}}{b^{10}\cdot a^{6}\cdot a\cdot b}=\boxed{ab} \\\\\\a=-\dfrac{1}{3} \ ; \ b=-3\\\\\\a\cdot b=-\dfrac{1}{3} \cdot(-3)=\boxed1$