Question

best answer will be marked as the brainliest ​

Answer 1

Answer:

$(\frac{ - 2}{3} )^{7} \times ( \frac{ - 2}{3} )^{ - 4} = \\ = > (\frac{ - 2}{3}) ^{7 - 4} = ( \frac{ - 2}{3} )^{3} = \frac{ - 8}{27} \\ \\ \\ \\ 2. \\ \\ ( \frac{ - 7}{10} ) ^{9} \div (\frac{ - 7}{10} )^{7} \\ \\ = > (\frac{ - 7}{10} )^{2} \times (\frac{ - 7}{10} )^{7} \times (\frac{ 10}{ - 7} )^{7} \\ \\ = > \frac{49}{100} \\ \\ \\ \\ 3. \\ \\ (( \frac{7}{10} )^{ - 2} ) ^{3} \\ \\ = > ((\frac{10}{7} ) ^{2} ) ^{3} \\ \\ = > ({ \frac{10}{7} })^{6}$

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