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When simplified (x^(-1)+y^(-1))^(-1) is ...

When simplified `(x^(-1)+y^(-1))^(-1)` is equal to `(a)\ x y` (b) `x+y` (c) `(x y)/(x+y)` (d) `(x+y)/(x y)`

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`(x^(−1)+y^(−1))^(−1)`
`=(1/x+1/y)^(−1)`
`=((x+y)/(xy))^(−1)`
`=(xy)/(x+y)`
`therefore` When simplified `(x^(-1)+y^(-1))^(-1)=(xy)/(x+y)`
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