RI Complex Numbers Tutorial Q4

RI Complex Numbers Tutorial Q4

5 marks
Tutorial

Given that \({{\left| \frac{2\mathbf{i}-{{z}^{*}}}{z}-1 \right|}^{2}}+z=-\mathbf{i}\), find \(z\) in the form \(x+\mathbf{i}y\).

State the exact values of \(\left| z \right|\) and \(\arg \left( z \right)\).[5]

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Answer:\(z = -4 - i\), \(|z| = \sqrt{17}\), \(\arg z = \tan^{-1}\left(\frac{1}{4}\right) - \pi\)

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