Answer
$-1$
Work Step by Step
RECALL:
(1) $a^{mn} = (a^m)^n$
(2) $i^2=-1$
Use rule (1) above to obtain:
$=(i^2)^5$
Use rule (2) above to obtain:
$=(-1)^5
\\=(-1)(-1)(-1)(-1)(-1)
\\=-1$
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