[tex]c) \ (2^{5})^{-2} =2^{5\cdot(-2)} = 2^{-10} = (\frac{1}{2})^{10}=\frac{1}{1024}\\\\d) \ (0,25^{-1})^{-4} = 0,25^{-1\cdot(-4)} = 0,25^{4} = (\frac{25}{100})^{4} = (\frac{1}{4})^{4} = \fracc{1}{256}\\\\e) \ 5^{-9}:5^{-11} = 5^{-9-(-11)} = 5^{-9+11} = 5^{2} = 25\\\\f) \ 4:4^{-4} = 4^{1-(-4)} =4^{1+4} = 4^{5} = 1024[/tex]
