Question

помогите пожалуйста ​

Answer 1

$\frac{1}{ {x}^{6} } = {x}^{ - 6}$

$- 9 \times {3}^{ - 2} + {7}^{0} = - 9 \times \frac{1}{ {3}^{2} } + 0 = - 9 \times \frac{1}{9} = - 1$

${y}^{ - 8} = \frac{1}{ {y}^{8} }$

$- {( \frac{9}{13} )}^{ - 1} = - \frac{13}{9}$

$\frac{1}{64} = \frac{1}{ {2}^{5} } = {2}^{ - 5}$

$\frac{ {10}^{ - 2} \times {15}^{ - 4} }{ {30}^{ - 4} } = \frac{ {30}^{4} }{ {10}^{2} \times {15}^{4} } = \frac{ {6}^{4} \times {5}^{4} }{ {5}^{2} \times {2}^{2} \times {5}^{4} \times {3}^{4} } = \frac{ {6}^{4} \times {5}^{4} }{ {5}^{6} \times {2}^{2} \times {3}^{4} } = \frac{ {6}^{4} }{ {5}^{2} \times {2}^{2} \times {3}^{4} } = \frac{ {2}^{4} \times {3}^{4} }{ {5}^{2} \times {2}^{2} \times {3}^{4} } = \frac{ {2}^{2} }{ {5}^{2} } = \frac{4}{25}$