26) 0,25.(-

26) $$0.25 \cdot \left(\frac{1}{4}\right)^2 = \frac{1}{4} \cdot \left(\frac{1}{4}\right)^2 = \left(\frac{1}{4}\right)^1 \cdot \left(\frac{1}{4}\right)^2 = \left(\frac{1}{4}\right)^{1+2} = \left(\frac{1}{4}\right)^3 = \frac{1}{4^3} = \frac{1}{64}$$

Ответ: 1/64