Answer
$n$. $4$, $2, -2, 2i, -2i$, $2$. See graph.
Work Step by Step
How many different nth roots does a nonzero complex number have? $n$. The number 16 has $4$ fourth roots. These roots are $2, -2, 2i, -2i$. In the complex plane these roots all lie on a circle of radius $2$. See graph.
