2 ^ { x } = 3 ^ { y } = 6 ^ { - z } , \text { show that } : \frac { 1 – InterviewSolution

1.	2 ^ { x } = 3 ^ { y } = 6 ^ { - z } , \text { show that } : \frac { 1 } { x } + \frac { 1 } { y } + \frac { 1 } { z } = 0
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