Question

5^-4•5^2. 12^-3:12^-4. (3^-1)^-3.
решите

Answer 1

$5^{-4} * 5^{2} = 5^{-4+2} = 5^{-2}= frac{1}{ 5^{2} } = frac{1}{25} =0,04$

$12^{-3}: 12^{-4} = 12^{-3-(-4)} = 12^{-3+4} =12$

$( 3^{-1}) ^{-3}= 3^{-1*(-3)} = 3^{3}=27$