Автор - ololosha14

Найдите значения выражения  frac{1}{4x} - frac{4x+5y}{20xy} , при x=√21, y= frac{1}{4}

Ответ

Автор - konovalova20111
 frac{5y-(4x+5y)}{20xy} = frac{5y-4x-5y}{20xy} = frac{-4}{20* frac{1}{4} } = frac{-4}{5} =-0,8

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