Ответ:
2. Найдите значение выражения:
- \[ 8^5 \cdot 8^{-7} = 8^{5+(-7)} = 8^{-2} = \frac{1}{8^2} = \frac{1}{64} \]
- \[ 10^{-9} \cdot 10^{11} = 10^{-9+11} = 10^{2} = 100 \]
- \[ 5^{-16} : 5^{-19} = 5^{-16-(-19)} = 5^{-16+19} = 5^{3} = 125 \]
- \[ 4^{-9} \cdot \frac{4^{-13}}{4^{-22}} = 4^{-9} \cdot 4^{-13-(-22)} = 4^{-9} \cdot 4^{-13+22} = 4^{-9} \cdot 4^{9} = 4^{-9+9} = 4^{0} = 1 \]
- \[ \frac{(12^4)^{-6}}{(12^{-3})^{-8}} = \frac{12^{4 \cdot (-6)}}{12^{-3 \cdot (-8)}} = \frac{12^{-24}}{12^{24}} = 12^{-24-24} = 12^{-48} \]
- \[ \frac{10^{-4} \cdot (10^7)^5}{(10^{-6})^2 \cdot 10^{-5}} = \frac{10^{-4} \cdot 10^{7 \cdot 5}}{10^{-6 \cdot 2} \cdot 10^{-5}} = \frac{10^{-4} \cdot 10^{35}}{10^{-12} \cdot 10^{-5}} = \frac{10^{-4+35}}{10^{-12+(-5)}} = \frac{10^{31}}{10^{-17}} = 10^{31-(-17)} = 10^{31+17} = 10^{48} \]
