\frac { 2 ^ { n } + 2 ^ { n - 1 } } { 2 ^ { n + 1 } - 2 ^ { n } } – InterviewSolution

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1.	\frac { 2 ^ { n } + 2 ^ { n - 1 } } { 2 ^ { n + 1 } - 2 ^ { n } }
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