Mathematics, 13.07.2019 02:00, DAVISJOS00123

For complex numbers z, let $f(z) = \left\{ \begin{array}{cl} z^{2}& \text{ if }z\text{ is not real}, \\ z+2 & \text{ if }z\text{ is real}. \end{array} \right.$ find $f(i)+f(1)+f(-1)+f(-i)$ .

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For complex numbers z, let [tex] \[f(z) = \left\{ \begin{array}{cl} z^{2}& \text{ if }z\text{ is...