0.0.1 ↑ 25. Hausaufgabe
0.0.1.1 ↑ Selbstgestellte Aufgabe
z \mapsto w = -2\mathrm{i}z^* + 2 + 4\mathrm{i};
x_0 + \mathrm{i}y_0 = -2\mathrm{i}\left(x_0 - \mathrm{i}y_0\right) + 2 + 4\mathrm{i} = -2\mathrm{i}x_0 - 2y_0 + 2 + 4\mathrm{i};
⇒ x_0 + 2y_0 - 2 = \mathrm{i}\left(-2x_0 - y_0 + 4\right);
⇒ {} \left\{\begin{array}{rcl} {} x_0 + 2y_0 - 2 &=& 0; \Rightarrow x_0 = 2 - 2y_0; \\ {} -2x_0 - y_0 + 4 &=& 0; \Rightarrow x_0 = 2 - \frac{y_0}{2}; \quad y_0 = 4 - 2x_0; {} \end{array} \right\} \\\Rightarrow {} \left\{\begin{array}{l} {} 2 - 2y_0 = 2 - \frac{y_0}{2}; \Rightarrow 4y_0 = y_0; \Rightarrow y_0 = 0; \\ {} x_0 = 2 - 2\left(4 - 2x_0\right) = 2 - 8 + 4x_0 = -6 + 4x_0 = 0; \Rightarrow x_0 = 2; {} \end{array}\right.
⇒ z_0 = 2;