Ответ:
-19/18
Объяснение:
8^{-c} = 2^{3}2^{1/2}2^{-1/3} => 2^{-3c} = 2^{3+1/2-1/3} => -3c = 19/6 => c=-19/18" alt="(\frac{1}{8})^{c} = \frac{8\sqrt 2}{\sqrt[3]{2}} => 8^{-c} = 2^{3}2^{1/2}2^{-1/3} => 2^{-3c} = 2^{3+1/2-1/3} => -3c = 19/6 => c=-19/18" align="absmiddle" class="latex-formula">