Решение:
- \( (3^3)^{-1} = 3^{3 \times (-1)} = 3^{-3} = \frac{1}{3^3} = \frac{1}{27} \)
- \( 11^{12} \cdot 10^{-10} = 11^{12} \cdot \frac{1}{10^{10}} = \frac{11^{12}}{10^{10}} \)
- \( 8^{-8} : 8^{-7} = 8^{-8 - (-7)} = 8^{-8 + 7} = 8^{-1} = \frac{1}{8} \)
Ответ: а) \(\frac{1}{27}\); б) \(\frac{11^{12}}{10^{10}}\); в) \(\frac{1}{8}\).