Lös ut D_f
D_{f}=\sqrt{||x-1|-3|-2}
\left(x\geq 0\text{ and }x\leq 2\right)\text{ or }x\leq -4\text{ or }x\geq 6
Lös ut x
\left\{\begin{matrix}x=D_{f}^{2}+6\text{; }x=-D_{f}^{2}-4\text{, }&D_{f}\geq 0\\x=2-D_{f}^{2}\text{; }x=D_{f}^{2}\text{, }&D_{f}\geq 0\text{ and }D_{f}\leq 1\end{matrix}\right,
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Exempel
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