Question

срочно пж 30 баллов ​

Answer 1

$1) \ \Big(\dfrac{x^{4}\cdot x^{7}}{x^{-5} } \Big)^{-2} =\Big(x^{4+7-(-5)}\Big)^{-2}=\Big(x^{4+7+5}\Big)^{-2}= \Big(x^{16}\Big)^{-2}=x^{-32}=\boxed{\dfrac{1}{x^{32} }}\\\\\\2) \ \dfrac{1}{(x^{-8})^{5}}=\dfrac{1}{x^{-40} }=\boxed{x^{40}}$