Question

помогите пожалуйста даю 20 баллов​

Answer 1

Ответ:

$2 {}^{ - 3} = \frac{1}{2 {}^{3} } = \frac{1}{8} = 0.125$

$( \frac{2}{5} ) {}^{3} = \frac{2 {}^{3} }{5 {}^{3} } = \frac{8}{125} = 0.064$

$- 4 {}^{ - 3} = - \frac{1}{4 {}^{3} } = - \frac{1}{64}$

$( - 2.25) {}^{ - 1} = ( - \frac{ 9}{4} ) {}^{ - 1} = - \frac{4}{9} = - 0.4$

$( - 3) {}^{ - 3} = - \frac{1}{3 {}^{3} } = - \frac{1}{27}$

$0.02 { }^{ - 3} = ( \frac{1}{50} ) {}^{ - 3} = 50 {}^{3}$

$( - 0.3) {}^{ - 2} = ( - \frac{3}{10} ) {}^{ - 2} = ( - \frac{10}{3} {}) {}^{2} = \frac{100}{9} = 11 \frac{1}{9}$

$- ( - 2.3) {}^{ - 1} = - ( - \frac{10}{23} ) = \frac{10}{23}$

$( - 1) {}^{ - 22} = 1 {}^{ - 22} = 1$

$1.25 {}^{ - 2} = ( \frac{5}{4} ) {}^{ - 2} =( \frac{4}{5} ) {}^{2} = \frac{16}{25} = 0.64$

Объяснение:

$( - 2 \frac{1}{2} {}^{ } ) {}^{ - 3} = \frac{1}{(2 \frac{1}{2} ) {}^{3} } = \frac{1}{( \frac{5}{2}) {}^{3} } = \frac{8}{125} = 0.064$

$- ( - 2 \frac{1}{3} ) {}^{ - 2} = - ( - \frac{7}{3} ) {}^{ - 2} = - ( - \frac{3}{7}) {}^{2} = - \frac{9}{49}$