Answer
$1$
Work Step by Step
Solve $i^{16}$
Since, $i^2=-1$ and $i^2 \cdot i^2=(-1)(-1)=1$
Thus,
$i^{16}=(i^2)^4 \cdot (i^2)^4=(-1)^4(-1)^4=(1)^4=1$
Hence, $i^{16}=1$
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