Question

СРОЧНО НАПИШИТЕ ОТВЕТ​

Answer 1

Ответ:

$a=\sqrt{32}\ ,\ \ b=\dfrac{1}{\sqrt2}\\\\\\\Big(\dfrac{1}{4a}-\dfrac{1}{5b}\Big)\, :\, \Big(\dfrac{b}{4}-\dfrac{a}{5}\Big)=\dfrac{5b-4a}{20ab}\, :\, \dfrac{5b-4a}{20}=\dfrac{5b-4a}{20ab}\cdot \dfrac{20}{5b-4a}=\\\\\\=\dfrac{1}{ab}=\dfrac{1}{\sqrt{32}\cdot \dfrac{1}{\sqrt2}}=\dfrac{1}{\sqrt{16}}=\dfrac{1}{4}$