Найдите значение выражения
[tex] \frac{{x}^{4} + {y}^{4}}{ {x}^{2} {y}^{2} } [/tex]
,при
[tex] \frac{x}{y} + \frac{y}{x} = 4[/tex]
[tex] \frac{{x}^{4} + {y}^{4}}{ {x}^{2} {y}^{2} } [/tex]
,при
[tex] \frac{x}{y} + \frac{y}{x} = 4[/tex]
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