Atasi untuk x
\left\{\begin{matrix}x\geq \frac{n}{r}\text{, }&r<0\\x\in \mathrm{R}\text{, }&n\geq 0\text{ and }r=0\\x=\frac{n}{r}\text{, }&n\geq 0\text{ or }r\neq 0\\x\leq \frac{n}{r}\text{, }&r>0\end{matrix}\right,
Atasi untuk r
\left\{\begin{matrix}r\geq \frac{n}{x}\text{, }&x<0\\r\in \mathrm{R}\text{, }&n\geq 0\text{ and }x=0\\r=\frac{n}{x}\text{, }&n\geq 0\text{ or }x\neq 0\\r\leq \frac{n}{x}\text{, }&x>0\end{matrix}\right,
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