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Simplify the Compound Fractional Expression $\frac { x ^ { - 1 } + y ^ { - 1 } } { x ^ { - 2 } + y ^ { - 1 } }$

Question 57

Essay

Simplify the compound fractional expression. $\frac { x ^ { - 1 } + y ^ { - 1 } } { x ^ { - 2 } + y ^ { - 1 } }$

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