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Mathematics
Problem
The least positive integer
n
n
n
such that
(
2
i
)
n
(
1
−
i
)
n
−
2
\frac{(2i)^n}{(1-i)^{n-2}}
(
1
−
i
)
n
−
2
(
2
i
)
n
,
i
=
−
1
i = \sqrt{-1}
i
=
−
1
, is a positive integer, is _____.
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