Question

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Answer 1

Ответ:

$( \frac{1}{7} ) {}^{ - 1} - ( - \frac{4}{9} ) {}^{0} + ( \frac{2}{5} ) {}^{2} \div \frac{3}{5} = 7 - ( - \frac{4}{9} ) {}^{0} + \frac{ (\frac{2}{5}) {}^{2} }{ \frac{3}{5} } = 7 - 1 + \frac{( \frac{2}{5} ) {}^{2} }{ \frac{3}{5} } = 6 + \frac{( \frac{2}{5}) {}^{2} }{ \frac{3}{5} } = 6 + \frac{ \frac{4}{25} }{ \frac{3}{5} } = 6 + \frac{4}{25} \times ( \frac{5}{3} ) = 6 + \frac{4}{15} = \frac{94}{15} = 6 \frac{4}{15}$