Question

The value of (x^-1 + y^-1)^-1

Answer 1

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Answer 2

$(x {}^{ - 1} + y {}^{ - 1} ) {}^{ - 1} \\ = > (\frac{1}{x} + \frac{1}{y} ) {}^{ - 1} \\ = ( \frac{y + x}{xy} ) {}^{ - 1} = \frac{xy}{(y + x)}$
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