Question

256 elevado a -1/4, Respondam com cálculos por favor...

Answer 1

256 (-1/4) = 1/256(1/4) = 1/4V256 = 1/4. 
Resposta: 1/4.

Answer 2

$256^-^\frac{1}{4}\\\\ 256 = 2^8\\\\ 2^8^(^-^\frac{1}{4}^)\\\\\ 2^-^\frac{8}{4}\\\\\ 2^-^2 \\\\ \boxed{\frac{1}{4}}$