allery|z|² = z × z̄. If |z|² = 4 and Re(z) = 1, then Im(z):
A±√3
B√3
C2
D±2
Answer & Solution
Correct answer: A. ±√3
|z|² = a² + b² = 4. With a = 1: b² = 3, so b = ±√3.
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