2024 MI PRU2 P2 Q1

2024 MI PRU2 P2 Q1

5 marks

Do not use a calculator in answering this question.

Find the complex numbers \(w\) and \(z\) which satisfy the following simultaneous equations.

\(2w+\mathbf{i}\,z=1\)
\({{w}^{*}}+2z=7+11\,\mathbf{i}\)

Give your answers in the form \(a+b\mathbf{i}\), where \(a\) and \(b\) are real numbers. [5]

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Answer:\(w=3-\mathrm i,\qquad z=2+5\mathrm i\).

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