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If x=2 and y=4 , then ((x)/(y))^(x-y)+((...

If x=2 and y=4 , then `((x)/(y))^(x-y)+((y)/(x))^(y-x)`=________.`

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If x=2 and y=4 then x^(y/x)+y^(x/y)= ______

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