Leystu fyrir x
\left\{\begin{matrix}x>\frac{9}{4Y_{9}}\text{, }&Y_{9}>\frac{1}{2}\\x>\frac{9}{2}\text{, }&Y_{9}=\frac{1}{2}\\x<\frac{9}{4Y_{9}}\text{, }&Y_{9}<0\\x\in \left(\frac{9}{4Y_{9}},\frac{9}{4\left(1-2Y_{9}\right)}\right)\text{, }&Y_{9}>\frac{1}{3}\text{ and }Y_{9}<\frac{1}{2}\end{matrix}\right.
Leystu fyrir Y_9
\left\{\begin{matrix}Y_{9}>\frac{9}{4x}\text{, }&x>0\text{ and }x<\frac{27}{4}\\Y_{9}>\frac{1}{2}-\frac{9}{8x}\text{, }&x\geq \frac{27}{4}\\Y_{9}<\frac{9}{4x}\text{, }&x<0\end{matrix}\right.
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