zad7_1.tex

\documentclass[11pt,a4paper]{article}
\usepackage[polish]{babel}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{cases}

\title{Zadanie 1}
\begin{document}
	Zadanie 7.1
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$f_{(x)} = \Phi_{(x)} - 0.5$\\
$f_{(x)} = -f_{(-x)}$\\
$-f_{(-x)} = -(\Phi_{(-x)} - 0.5) = -\Phi_{(-x)} + 0.5 = -1 +\Phi_{(x)} + 0.5 = \Phi_{(x)} - 0.5 = f_{(x)}$

\end{document}