If \frac{1}{x} + \frac{1}{y} + \frac{1}{z} = 1, then (\frac{1}{z−1}) (\frac{1}{x} + \frac{1}{y}) + (\frac{1}{y−1}) (\frac{1}{x} + \frac{1}{z}) + (\frac{1}{x−1}) (\frac{1}{y} + \frac{1}{z}) = ?

Delhi Police Head Constable 10 Oct 2022 Shift 1

Question : 27 of 100

Marks: +1, -0

\;{1}/{x} + \;{1}/{y} + \;{1}/{z} = 1

, then

(\;{1}/{z−1}) (\;{1}/{x} + \;{1}/{y}) + (\;{1}/{y−1}) (\;{1}/{x} + \;{1}/{z}) + (\;{1}/{x−1}) (\;{1}/{y} + \;{1}/{z}) = ?

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