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Mathematics
Problem
z
z
z
is the complex number which satisfies the equation
3
z
−
4
z
∗
=
18
+
21
i
3z - 4z^* = 18 + 21i
3
z
−
4
z
∗
=
18
+
21
i
. Find
∣
z
3
∣
\left| \frac{z}{3} \right|
3
z
.
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