Question

$$\begin{align*} & 2^{x+1}=5^{y-1}=3\\ & \left( \frac {2} {3}\right) ^{\frac {1} {x}}+\left( \frac {1} {5}\right) ^{\frac {1} {y}}=?\end{align*}$$

Answer 1

$2^{-x}=\frac{2}{3}$ ise $5^{-y}=\frac{1}{15}$ ise bunu yerlerine yazarsan

$2^{-x.\frac{1}{x}}+5^{-y.\frac{1}{y}}=\frac{7}{10}$