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Complex Numbers
easy
0:00.0
Find the imaginary part of
(
2
+
i
)
(
1
+
3
i
)
(2 + i)(1 + 3i)
(
2
+
i
)
(
1
+
3
i
)
.
A
7
7
7
B
5
5
5
C
6
i
6i
6
i
D
−
3
-3
−
3
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