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If z1 = 2 + ?, z2 = 1 + 3?, then ? Re ( z1 z2 )...
1.
If z1 = 2 + ?, z2 = 1 + 3?, then ? Re ( z1 z2 ) =
A.
1
B.
?
C.
2 ?
D.
2
Answer» B. ?
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