1.

If , then z is

A.  purely real
B.  purely imaginary
C.  \[a+ib,\]where \[a\ne 0,\]\[b\ne 0,\]
D.  \[a+ib,\]where b = 4
Answer» C.  \[a+ib,\]where \[a\ne 0,\]\[b\ne 0,\]


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