Question

Даю 50 балов , помогите быстрей желательно ​

Answer 1

Ответ:

$2^{-3}=\dfrac{1}{2^3}=\dfrac{1}{8}=0,125\\\\(-3)^{-3}=\dfrac{1}{(-3)^3}=\dfrac{1}{-27}=-\dfrac{1}{27}\\\\(-1)^{-22}=\dfrac{1}{(-1)^{22}}=\dfrac{1}{1}=1\\\\\Big(\frac{2}{5}\Big)^3=\dfrac{2^3}{5^3}=\dfrac{8}{125}\\\\0,02^{-3}=\Big(\dfrac{2}{100}\Big)^{-3}=\Big(\dfrac{1}{50}\Big)^{-3}=50^3=125000\\\\1,25^{-2}=\Big(1\dfrac{1}{4}\Big)^{-2}=\Big(\dfrac{5}{4}\Big)^{-2}=\Big(\dfrac{4}{5}\Big)^2=\dfrac{4^2}{5^2}=\dfrac{16}{25}$