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Complex Numbers
medium
0:00.0
If
z
=
1
−
i
1
+
i
z = \frac{1-i}{1+i}
z
=
1
+
i
1
−
i
, what is the value of
z
20
z^{20}
z
20
?
A
1
B
i
C
-1
D
-i
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