Answer
$-1$;
$-1$;
$-i$
Work Step by Step
RECALL:
(1) $i^2=-1$
(2) For any odd integer $n$, $(-1)^n=-1$.
Thus, filling the missing expressions gives:
$(-1)^{17}i = (-1)i =-i$
Therefore, the missing expressions in the given statement are $-1$, $-1$, and $-i$, respectively.
