Question

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Question :

If xy = 1, then
$\frac{1}{1 + {x}^{ - 1} } + \frac{1}{1 + {y}^{ - 1} } = \: ?$

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Answer 1

Answer:

Correct answer: 1/xy

Step-by-step explanation:

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Answer 2

Answer:

a 1

Step-by-step explanation:

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