Question

please tell me the answers ​

Answer 1

$( \frac{1}{5}) {}^{3y} = \frac{8}{1000 } \\ { (\frac{1}{5}) }^{ \frac{3y}{3} } = { (\frac{8}{1000}) }^{ \frac{1}{3} } = ( \frac{ {2}^{3} }{ {10}^{3} } ){}^{ \frac{1}{3} } = { (\frac{2}{10} )}^{ \frac{3}{3} } = \frac{1}{5} \\ (\frac{1}{5}) {}^{y} = ( \frac{1}{5} ) {}^{1} \\ \\ y = 1$

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