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Complex Numbers
easy
0:00.0
What is
∣
z
∣
|z|
∣
z
∣
if
z
⋅
z
ˉ
=
9
z \cdot \bar{z} = 9
z
⋅
z
ˉ
=
9
?
A
9
9
9
B
9
\sqrt{9}
9
C
3
3
3
D
81
81
81
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