Question

упростите выражение срочнооо 2,4​

Answer 1

2) Упростите

${( \frac{4}{7}) }^{ - 2} \times {0.1}^{ - 3} = {( \frac{7}{4}) }^{2} \times { (\frac{1}{10} )}^{ - 3} = {( \frac{7}{4}) }^{2} \times {10}^{3}$

3) Вычислите

$\frac{ {9}^{ - 4} \times {9}^{ - 5} }{ {9}^{ - 6} \times {9}^{ - 6} } = \frac{ {9}^{ - 4 + ( - 5)} }{ {9}^{ - 6 + ( - 6)} } = \frac{ {9}^{ - 9} }{ {9}^{ - 12} } = {9}^{ - 9 - ( - 12)} = {9}^{ 3} = 81$

4) Упростите

${2}^{ - 3} + { (\frac{1}{9}) }^{ - 1} - { (\frac{5}{8}) }^{ - 2} = \frac{1}{ {2}^{3} } + {( \frac{9}{1}) }^{1} - {( \frac{8}{5} )}^{2} = \frac{1}{8} + 9 - \frac{64}{25}$