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Definičný obor funkcií a a b
\( \begin{array}{l}D(a)=(0 ; 2\rangle \\ D(b)=\langle-2 ; 0\rangle\end{array} \)
\( \begin{array}{l}D(a)=(1 ; 2\rangle \\ D(b)=\langle-2 ; 1\rangle\end{array} \)
\( \begin{array}{l}D(a)=(2 ; 3\rangle \\ D(b)=\langle-1 ; 2\rangle\end{array} \)
\( \begin{array}{l}D(a)=(1 ; 3\rangle \\ D(b)=\langle-3 ; 1\rangle\end{array} \)