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Number Systems
hard
0:00.0
What is the value of the expression
1
+
i
1
−
i
\frac{1 + i}{1 - i}
1
−
i
1
+
i
?
A
i
i
i
B
−
i
-i
−
i
C
1
1
1
D
−
1
-1
−
1
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