`f(x)=1/sqrt(|[|x|-1]|-5)` – InterviewSolution

1.	`f(x)=1/sqrt(\|[\|x\|-1]\|-5)`
Answer» `[\|x\|-1]-5>0` `[\|x\|-1]>5` `[\|x\|-1]<-5` `[\|x\|-1]>5` `\|x\|-1>=6` `\|x\|>=7` `x>=7` `x in (-oo,-7] uu[7,oo)`.

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