\frac { 3 \times 27 ^ { n + 1 } + 9 \times 3 ^ { 3 n - 1 } } { 8 \time – InterviewSolution

1.	\frac { 3 \times 27 ^ { n + 1 } + 9 \times 3 ^ { 3 n - 1 } } { 8 \times 3 ^ { 3 n } - 5 \times 27 ^ { n } }
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