Solve for x
\left\{\begin{matrix}x>0\text{, }&\left(\mu >0\text{ and }\epsilon >0\right)\text{ or }\left(\mu <0\text{ and }\epsilon <0\right)\\x<0\text{, }&\left(\mu >0\text{ and }\epsilon <0\right)\text{ or }\left(\epsilon >0\text{ and }\mu <0\right)\end{matrix}\right.
Solve for μ
\left\{\begin{matrix}\mu <0\text{, }&\left(\epsilon >0\text{ and }x<0\right)\text{ or }\left(x>0\text{ and }\epsilon <0\right)\\\mu >0\text{, }&\left(\epsilon <0\text{ and }x<0\right)\text{ or }\left(\epsilon >0\text{ and }x>0\right)\end{matrix}\right.
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